UPS under $90

Can someone recommend a decent UPS before $200? I honestly have no clue what specs actually matter here.

Is this one any good?

http://www.trgovina-racunala.com/ups...ema---pasivna/

What kind of gear are you planning to plug into the UPS? Are we just talking about the PC, or are you looking to cover all the peripherals too—like the modem, phone, external drives, or even the printer/scanner?

Check this out: Opti-ups VS-600C, 600VA, 345W - GovWin (manufacturer's site)
IMO, it’s plenty 🙄

Computer, monitor, printer. My PC is acting up big time (4xHDDs, 2xDVD drives, a GTX 460, plus some other cards)—not sure if that’s part of the problem. I'm running a 500W power supply.

Also, does it handle voltage regulation right away? Like, if there are fluctuations in the grid?

The model you mentioned in post #1 has this "Turbo Boost" feature; I'm assuming that refers to the Automatic Voltage Regulator.
It’s easily the best price out of everything listed on GovWin, and it's still under $200.