I have an Apple 22" LCD Cinema Display running on my Athlon XP 2000+/Radeon 8500/WinXPpro machine just fine.
I use a Dr.Bott DVI-ADC connector converter ($149). Works like a charm.
Native resolution is 1600 x 1024 (16:10 aspect ratio), and the picture is fantastic. On the Radeon, it'll also do 1280x1024 (square or stretched), 1280x768, 1024x768 and 800x600.
The Apple 22" Cinema Display is the only current Apple display that has hardware buttons for screen brightness. All others have software controls that only work on a Mac. The 22" model has physical brightness up/down buttons that work w/out a Mac. No other adjustable controls - the screen is a fixed-contrast display like many laptop LCDs, and there are no picture/color controls (aren't any on a Mac, either).
But it works great on my PC!
Retail is like $2400, so I'd be a little suspect about the price. But if legit, see if they've got two! I'll take the other one!