Condition
VRAM

Power cost est. at $0.13/kWh, 8 hrs/day avg.

Market:
RX 9070 XT—16 GB—$549—highest value score this week  ·  check price Arc B580—12 GB—$249—best card under $300  ·  check price RTX 3090 (used)—24 GB—$390—best VRAM-per-dollar for local AI  ·  eBay sold listings RTX 5090—worst value this week—$2,699—wait 6–12 months  ·  see analysis RTX 4080 Super—dropped $30 in 48 hrs—retailers clearing stock RX 9070 XT—16 GB—$549—highest value score this week  ·  check price Arc B580—12 GB—$249—best card under $300  ·  check price RTX 3090 (used)—24 GB—$390—best VRAM-per-dollar for local AI  ·  eBay sold listings RTX 5090—worst value this week—$2,699—wait 6–12 months  ·  see analysis RTX 4080 Super—dropped $30 in 48 hrs—retailers clearing stock
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Used GPU Fair Price Checker Enter an asking price to see if it’s a strong buy, fair, overpriced, or a bad deal.
GPU
Asking Price ($)
Warranty
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# ▲ GPU Price ⇅ $/GB VRAM ⇅ VRAM ⇅ Benchmark ⇅ $/TFLOPS ⇅ Power Cost ⇅ Value Score ⇅ Use Case Best Source

Value Score = (Benchmark ÷ Price) × VRAM multiplier. Higher = better value. Used cards scored 15% stricter.

Used GPU Buyer Risk Notes

RTX 3080 / 3090 — High mining risk. Both were heavily mined during 2020–2022. Many cards in circulation have degraded thermal pads and worn fans. Always request GPU-Z screenshots and run a stress test before the return window closes. Avoid any seller who declines.

RX 6800 XT — Low mining risk. AMD RDNA2 cards were rarely profitable for ETH mining and were not widely used for it. Lower saturation than Ampere cards. Safest used AMD buy in this generation.

RTX 3060 12GB — Low mining risk. NVIDIA shipped a mining limiter in the RTX 3060 that reduced ETH hashrate by ~50%. This card was actively avoided by miners. One of the safest Ampere cards to buy used.

RTX 3070 / 3080 Ti — Medium risk. Both were used for mining but less aggressively than the 3080/3090. Inspect seller history and listing photos carefully. Prefer listings with thermal images or benchmarks shown.

General rule: Any used card sold without a return window should be priced 15–20% below market to compensate for the risk. Request GPU-Z, VRAM test (using VRAM Test Tool), and a 30-minute Unigine Superposition run before committing.