Best buget/old game you have ever bought

What is the best game you have ever bought for less than $15? This can be a buget game or a game which had come out a while ago but you never picked up.

Mine would have to be Timespliters 2 for $5 on the gamecube.

GUN for Gamecube. I stole it when the gamestore I worked at went out of business.

I also bought Desperadoes for PC for a dollar at Sav-a-Lot.

I'm a sucker for Westerns.