Buying guides

Answer: 7 guides covering what to buy and what to pay. Hardware picks are ranked against live filtered eBay medians and refresh daily; the marketplace comparisons are editorial and updated when the landscape moves. See how fair values work.

Local AI hardware

What to buy for running models on your own machine, by VRAM and unified memory.

Best GPU for local AI →

Used cards ranked by VRAM, with fair values and live eBay medians.

How much VRAM do you need? →

12GB, 16GB, 24GB and 48GB — what each tier actually runs.

Mac vs GPU for local AI →

When unified memory beats a discrete card, and when it does not.

Muse Glimmer hardware requirements →

Memory needed per quantization for Meta's 30B model, mapped to real hardware.

Buying used

Price guidance and marketplace comparisons before you spend.

Best budget GPU →

Picks by price bracket: under $300, $300–500, $500–800.

Where to buy a refurbished iPhone →

Warranty, grading and protection weighed across the main options.

Is Back Market legit? →

How its vetting, grading and warranty actually work.

GPU price tracker Price index Methodology