Amazon has deigned to offer you a deal on this game for the same price they were selling it for regularly in July before jacking the price back up so they could bring you this exciting offer:
If it was $15, I would've totally bit . Left my Live 09 back in Cali. I need a basketball game to fill up the time till Live 10/2K10 comes out . Bummer.
Even though this guy confirmed it, it seems hard to believe that the $20 PC version has all the features of the $60 PS3/360 counterpart (minus trophies/achievements perhaps). Still if you're interested in playing it on PC, might be better to wait and see what happens with that version instead of getting 2K9 which will be dirt cheap anyways once 2K10 is out.
Its actually quite believable, the console markup on games is well known. The only thing the xbox has over other multiplayer setups is Live and its less crappy hackfest.