The day before I got my 360 I was wandering around a used game store called Disc Replay and saw LO for $15, BD for $10, Banjo for $25, and Kameo for $8. The only one I didn't feel ripped off on was LO. Luckily I later bought Fable II and Halo 3 and finally didn't regret my purchase, and with the recent release of Bayonetta want to make baby 360s for allowing me to play this awesome game at its best.
It was pretty much a spontaneous decision without much planning behind it. I'd planned to buy a 360 within a month or so but basically it was an unplanned impulse buy after i saw the games for cheap.
I also had started buying PS3 games before I got my PS3. I got Ratchet, Folklore, and Resistance because they were all under $20 a few days before I actually bought my 20GB PS3 on eBay (which is now a 320GB PS3).
