I don't buy used games, but than again I hardly play video games on my PS3 anymore and when I do it's usually a hot new game that just came out. I would be ok if they went with a Steam like approach, digital downloads, but Steam does offer competitive pricing and even frequent promotions.

I do play video games, but on my iPad, so I'm really fine with buying from an App Store environment, and really prefer that over having discs.