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 21 September 2026 . Tap a price to see that model's cheapest listings on eBay, or tap a model name for the full live list here.

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.

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