Anyone ever get really lucky in terms of pricing when buying a game?

-I got the Onimusha games (1-3) all for under $20. Yeah the games were used, but in perfect conditon.

-Devil May Cry 2 and 3 each for only $10 both close to their initial release.

Their are a couple more but I just can't think of them right now. Anyone else got some great buys?