Seriously, why did you buy it? i buy games for Xbox when i have no Xbox only if the game is rare, some special first edition, or dirt cheap. San Andreas is currently none of these.
If it helps, in the last month I have bought and not played Metal Arms, Breakdown, Viewtiful Joe, PN o3, Outrun 2, Neo Contra, and DOAU. Include the month before that and we have SF:AC, UT2K4, Silent Hill 4, Burnout 3, Katamari Damacy, and Bloodrayne 2 all bought and dropped pretty quick, altough I like most of em a lot.
GTA:SA has been played every night this week and I'm still in the first city.
A few years back I bought GTA3 from a guy brand-new for $60. He claimed the game wasn't going to be sold anymore...I didn't own a PS2 then, so I bought it. Gah. Worth every penny, though .