Cheapest CPUs on eBay, live right now.

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How to buy a used CPU

Processors are one of the safest used buys. A CPU has no moving parts and rarely wears out, so a used chip that works on arrival will almost certainly keep working. The main risk is compatibility, not reliability: confirm the exact socket (such as AM4, AM5 or LGA1700) and that your motherboard's chipset and BIOS support that specific model before buying.

Inspect the pins and mind the packaging. On AMD chips the pins are on the processor, so check close-up photos for bent or missing pins, which are a dealbreaker. On modern Intel the pins are in the socket instead, so the chip itself is safer. Avoid vague "engineering sample" or "ES/QS" listings, which are pre-release chips that can be locked or unstable.

Generational value. The best value sits one or two generations back, where a former flagship now sells for a fraction of its launch price yet still outperforms current budget chips. Work out the real-world performance you need rather than chasing the newest generation, and check whether a cooler is included, as many used chips are sold bare.

Value. Used CPUs typically sell 40-60% below launch price for the same performance, making a last-gen chip one of the best-value PC upgrades going.

Common questions

Cheapest by model, at a glance

A daily snapshot of the lowest genuine eBay price for every model we track, and how good that price is right now versus its usual level, updated automatically. Prices last refreshed 12 October 2026. Tap a price to see that model's cheapest listings on eBay, or tap a model name for the full live list here.

These are second hand prices, listed by sellers as used or pre-owned, taken from live eBay US listings in US dollars. In collectible categories a sealed or unworn item is sometimes the cheapest genuine listing, and it is included. The same number works both ways: it is what a buyer pays today and the resale value a seller can realistically ask. Every model also carries a price history, the daily record kept since tracking began, which is the part to read before you buy or resell. On a day when a model has no listing that passes these filters, its row keeps the last price we recorded rather than inventing one, and drops off this table if that goes on for more than a few days.

Under each model is the actual listing that price came from, so you can see whether it is the thing you want or a bundle, a variant, or an accessory that happens to share the name.

"Off retail" compares today's used price with what the model costs new. For anything still on sale that is its current new price, so the figure is close to a discount you could really get. For anything no longer sold it is the last new price we have on record: on a boxed product like a LEGO set or a console that is the RRP, and on a part like a graphics card it is nearer what new stock was going for at the end than what it cost at launch. So on older hardware read it as depreciation against late retail rather than against the original sticker. A few rows read "above" instead: they cost more used than new, which is normal for a retired set or a part nobody makes any more.

Over the period we have tracked, this category is down 2.5%, while the used market as a whole is down 0.3%. See the Used Price Index, which is built from these prices and published as a free CSV.

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