Should I buy a used Sony Cyber-shot T90 for Y2K photos?

Yes — the Sony Cyber-shot DSC-T90 can be a good buy if you want a compact camera for Y2K-style photos, especially for that pocketable point-and-shoot look with built-in flash and a nostalgic digicam feel. It can work well for casual retro photos, but the exact results will depend on the condition of the individual unit and your settings.

I’d only buy one if the listing is clearly tested and working, because older compact cameras can be hit-or-miss. Check that it powers on, the lens extends properly, the screen works, the battery holds a charge, and that any needed charger/accessories are included. Also make sure you know what memory card format it uses, since older Sony compacts often use Sony-branded memory cards rather than standard SD cards.

So: yes, if you want the aesthetic and find a clean, working unit at a reasonable price. If the used price is high, compare it with other compact Sony cameras from the same era before buying.