How to get started flipping PCs

Flipping PCs starts the same way for almost everyone. You upgrade your own machine, you are left with a pile of parts you no longer need, you sell them, and the total surprises you. Then you go looking for a cheap machine to do it again on purpose.

That second step is where it becomes a thing you can be good at, and where the money is made or lost long before anything is listed. Here is what it takes to start properly.

How much do you need to get started?

Two numbers, and the second one matters more than people expect.

The first is the machine. A tired office PC, a non-working gaming build, or a box of parts from someone clearing out a garage is not an expensive purchase in any currency. You are looking at the cost of a night out for something with an 8GB graphics card in it, if you buy patiently. Start there rather than with an ambitious build, because the first machine is the one you learn on and the one where you will get the price wrong.

The second is the kit, covered below. It is a one-off cost, it is roughly the same as one cheap machine, and you will never buy most of it again.

The important discipline is not the total. It is holding some of it back. Every new flipper spends their entire budget on the first buy, and then the genuinely good listing appears the following Tuesday and they cannot act on it. Keep roughly half your money liquid. Flipping is a game of being able to say yes quickly, and a full cupboard with an empty wallet is the position you least want to be in.

What to look for when you are buying

You are not shopping for hardware. You are shopping for mispriced listings, and those look like a particular thing.

Badly written listings of good parts. “Gaming PC, runs great, $400” with one blurry photo taken at night is the classic. No model numbers, no specification, no benchmark. The seller does not know what they have, so the price came from a guess. A listing that names the exact card, quotes a 3DMark score and shows the inside of the case is priced correctly, and correctly priced is not your business.

Untested, non-working, and “for parts”. This is the widest margin available to a beginner, because most dead PCs are not dead. The common causes are a failed power supply, a stick of RAM that has walked out of its slot, a drive that has given up, or a CPU cooler that was never seated properly. All of those are cheap. The ones that are not cheap are a dead motherboard or a dead CPU, and those are the risk you are being paid to take. Price the machine as if the worst is true and treat anything better as upside.

Whole-machine listings carrying one valuable part. An otherwise dated build with a current graphics card or a good high-wattage power supply in it is worth more in pieces than the seller is asking for it whole. That is the core of parting out versus selling whole, and it is worth reading before you buy, not after, because it changes what you are willing to pay.

Office lots and clear-outs. Ex-corporate small form factor machines are dull and they are cheap in volume. They rarely contain a graphics card, but they contain RAM, drives and CPUs, and they sell steadily to people who want a cheap desktop. They are also the least glamorous and least competitive corner of the market, which is exactly why the prices are soft.

What to walk away from: liquid damage, bulging or leaking capacitors, physical damage to a PCIe slot or a CPU socket with bent pins, and anything where the seller will not let you power it on if you are collecting in person. Also be careful with no-name power supplies that shipped free with a case. Those go in the bin, not the listing, and a build that includes one needs a replacement costed in before you make an offer.

If you are not yet confident about which older parts still hold up, the hardware the used market forgot is a good map of what is worth owning at the budget end, and working out what a used PC is worth is the method for turning a listing into a number before you message the seller.

The kit you actually need

You can start with a screwdriver, but this list is what stops you losing money to avoidable problems. None of it is expensive, and most of it lasts for years.

A magnetic precision screwdriver set. Cheap sets round off screws and cost you a motherboard standoff you cannot remove. Buy one decent set with a magnetic tip and a long shaft for reaching into cases.

Thermal paste. Any reputable brand in a tube big enough to do twenty CPUs. Every second-hand CPU cooler you touch will have a dried grey crust on it, and repasting is the single cheapest thing you can do to make a machine run and benchmark better.

99% isopropyl alcohol, lint-free cloths and brushes. For cleaning off old paste, cleaning contacts, and cleaning grime off panels and glass. A soft anti-static brush for dust in fans and heatsinks.

An electric duster. Get the rechargeable blower rather than cans of compressed air. The cans run out constantly, spit propellant when tilted, and work out expensive after three machines. Hold fans still with a finger while you blow them out, because spinning a fan with airflow can generate enough current to damage it. Dust is the cheapest thing on this list to fix and it changes what the photos say about the machine.

A USB stick with Windows on it. Keep one permanently made up, and consider Ventoy so a single stick can hold a Windows installer, a Linux live image and your diagnostic tools together. You will use it on every machine.

A known-good spare power supply. The most useful diagnostic tool you can own. A decent modern unit you keep on the bench turns “it will not turn on” into a five-minute test rather than an afternoon of guessing. If you can also keep a known-good spare graphics card, stick of RAM and cheap CPU for the sockets you see most, you can isolate almost any fault by substitution.

A motherboard debug speaker. The most underrated thing on this list and one of the cheapest. It is the tiny speaker that plugs into the front panel header and beeps through POST. Modern boards mostly have debug LEDs or a two-digit code display, but plenty of the older hardware you will be buying has neither, and without a speaker a board that fails to POST tells you nothing at all. With one, the beep code names the fault: no RAM, no graphics, a CPU problem. It is also just faster on a working machine, because a single short beep tells you it posted without you waiting on a monitor to wake up.

Antistatic bags and storage boxes. Covered properly below.

Software, all free. 3DMark for proving performance and for stress testing, CrystalDiskInfo for drive health and bytes written, HWiNFO for temperatures and sensors, and MemTest86 for RAM. These are what turn your claims into evidence in a listing.

Packaging materials. Bubble wrap, antistatic bags, and boxes that are not the ones your groceries came in. Damage in transit is a refund, a bad review, and the loss of the item all at once.

Test before you price

The habit that separates people who make money from people who acquire hardware is bench testing.

Take the machine apart, put the motherboard on its box on a table, and build the minimum: CPU, cooler, one stick of RAM, power supply, the debug speaker, and a monitor cable to whatever outputs display. Get it to POST before you care about anything else, and let the speaker tell you whether it did rather than waiting on a monitor. Then add parts one at a time. When something stops it working, you have found your fault, and you found it in twenty minutes rather than after you had listed the machine as working.

Run the drives through CrystalDiskInfo, run the RAM through a memory test if the machine is unstable, and run a 3DMark loop on anything with a graphics card. Half an hour on a bench moves the price you can honestly ask more than any other half hour available to you, and it means every claim in your listing is something you have watched happen.

How to store parts without losing money

This is the boring section and it is where most beginner profit quietly disappears.

Parts do not sell the week you get them. A graphics card might, a motherboard might sit for two months, and in that time it needs to survive, stay findable, and stay attached to what you paid for it.

Antistatic bags for everything with a circuit board. Graphics cards, motherboards, RAM, drives, expansion cards. Not a plastic shopping bag, which generates static rather than dissipating it. Keep the bags parts arrive in and they will outlast several sales.

Original boxes where you have them. A boxed part sells faster, holds a small premium, and ships far more safely. Motherboard boxes in particular are the right size and shape to store the motherboard and its accessories together.

Label everything with what you paid and when. A sticker or a strip of masking tape with the date and the price. Six weeks later you will not remember whether the RAM came out of the machine you paid $120 for or the one you paid $300 for, and without that you cannot tell whether the sale made money.

Keep the accessories with the part. Motherboard I/O shields, SATA cables, CPU coolers, modular power supply cables, screws and standoffs. A modular power supply without its cables is close to worthless, and an I/O shield you cannot find costs you a small deduction on every listing.

Store somewhere dry, cool and stable. Not a damp garage, not a hot roof space. Silica gel packets in the boxes if your climate is humid. Condensation and corrosion turn working parts into dead ones slowly enough that you will not notice until you try to sell.

Set a shelf limit. Decide how much space the operation gets, and when it is full, build something out of it rather than buying more. Hoarding is the failure mode of this hobby. A part sitting on a shelf for a year is a part that has lost value every month while your money was locked up in it.

Preparing a machine to sell

Once it works and it is clean, the prep is a checklist rather than a skill: prove performance with a benchmark, do a clean Windows install with the drivers already in place, write out the full specification with exact model numbers, and photograph it in daylight with the side panel off and the RGB turned down.

That is a post on its own, and it is here. Do the whole list. Each item removes a reason for a buyer to hesitate or to knock the price down, and the tape over the motherboard’s video ports alone will save you the most common post-sale message a PC seller gets.

Then make the call on whether it goes out as a machine or as parts. That is the part-out decision, and for most older builds the answer is pieces.

Where to sell

There is no single answer, because it depends where you are. The pattern that works almost everywhere is to use one local marketplace for whole machines and one shipping marketplace for individual parts.

Local, cash, no shipping. Facebook Marketplace is the closest thing to a global default and takes no fee on local sales, which matters on a $500 machine. Alongside it, the local classifieds site of your country: Craigslist and OfferUp in the US, Gumtree in the UK and Australia, Kijiji in Canada, Marktplaats in the Netherlands, Leboncoin in France, Blocket in Sweden, Willhaben in Austria. Whole PCs are heavy, awkward, easily damaged in transit and expensive to ship, so selling them locally is usually right.

Shipping, wider reach, higher fees. eBay has the deepest buyer pool for individual components almost everywhere it operates, and its sold listings are also your best pricing research. Trade Me does the same job in New Zealand and Mercari in Japan. Jawa is worth knowing in the US specifically, because it deals only in PC hardware, so the buyers arrive already knowing what they want.

Enthusiast communities. Hardware swap forums, r/hardwareswap, local PC building Discord and Facebook groups. Lower fees, buyers who understand what you are selling and do not need convincing, and no explaining what a chipset is. In exchange, tighter expectations on price, and reputation matters more than anywhere else.

Whichever you use, list the same machine in more than one place if the rules allow it, and take the listing down the moment it sells. Nothing costs a reputation faster than agreeing a sale twice.

Tips that take a while to learn

You make your money when you buy. A machine bought well is profitable before you touch it. A machine bought badly cannot be fixed by a clever listing, better photos or patience. If the numbers do not work at the asking price, walk away. There is always another listing.

Never fall in love with the hardware. The card you were quietly hoping to keep is the card you paid too much for. Decide the price before you see it in person.

Expect one in five to disappoint. Something will be a dead motherboard, a CPU with bent pins, or a card that artifacts under load. Price your buys so an occasional dud is absorbed rather than fatal, and treat it as a cost of doing business rather than a disaster.

Meet safely and take cash. Public place, daylight, someone knows where you are. Count the cash before the machine goes in the boot. Be wary of anyone who wants to pay by an unusual method or overpay and have the difference sent back, because that is a scam with a very long history.

Time your buying. Prices soften after Christmas and after major hardware launches, when people upgrade and sell what they replaced. That is when to have cash available.

Bundle the parts nobody wants. Cases, coolers, mechanical drives and old motherboards move slowly. Throw them in with something good, or list them as a lot. The art is not squeezing the last dollar out of a case, it is not letting a case take up a shelf for a year.

Count your time. Two hours of cleaning, testing and photographing plus three weeks of messages for a $40 margin is a job you have given yourself. That is fine when you are learning. It is not a business.

The shelf becomes the business

The first few machines are simple. One PC in, a few sales out, a rough sense of whether it went well.

What changes is not the volume, it is the shape of the work. After three or four machines you are not really buying and selling PCs any more. You are running a shelf, and the next flip gets assembled out of it. A 650W power supply from the machine you parted out, a motherboard you kept because the CPU was still in it, two sticks of RAM from a different buy, a case somebody gave you, and a graphics card that has not sold yet. There is very often a complete, sellable machine sitting in that pile, and the only thing between you and it is knowing what you have and what fits with what.

That is the shift worth planning for. The question stops being “is this listing a good buy” and becomes “what can I build from what I already own, and what is the one part I am missing”. Answer it well and the next thing you buy is a $40 motherboard that completes a build, instead of another whole machine that adds five more parts to the shelf. Answer it badly and you keep buying, the pile grows, and your money sits in components you have forgotten you own.

The money question shows up at the same time. One purchase became six parts sold to six people over two months on three different sites, minus fees on each, plus the replacement power supply you bought, plus the two parts still in a box. Multiply that by five machines in flight and “did that actually make money” stops being answerable from memory.

That is what PartPlanner is for: every part you own in one place, builds planned and compatibility-checked against the parts already on the shelf, and what each part cost carried through to what the finished machine sold for. Start with a notebook by all means. The point it stops keeping up is the point you have a real operation rather than a hobby with a cupboard attached.