Ebay is definitely a sellers marketplace. I rarely find better deals that what some good searching on deal sites and froogle.com can produce.
Speaking of pirated software, I purchased a couple of software titles from an eBAY seller that had good positive feedback selling software in the past. Turns out the software he sent me was just copied onto a cd, and labeled with a color copy of the original. He made no mention of the fact that it was pirated.