With the old system, filled with its 25% or 26% off and free shipping, I used to order used games at least two or three times a week. Why? Geez, when you can start grabbing quality games for just a few bucks a pop there's something to be said for the savings. Combine that with the fact that I would be clearing out games that only other CAGers would care about, or some old-school-minded fans would have any interest in, I'm just clearing old used inventory they would just junk anyway.
But now...good lord. I won't do it again. Two years of EB used packages (across around 50 seperate orders) and not a single destroyed or damaged game whatsoever compared to two months of EB/GS used packages (around 4 different orders) where half of the games are either defective or absolutely ruined. I'm far less than thrilled by this.
At least the discount is about right for the more expensive games, though. It really drives down the somewhat inflated prices of other games, thankfully. And, if you're really desperate for a particular title, it's worth going for. At worst you get angry at getting a frisbee and you toss it back at EB/GS and get a refund or an exchange for the garbage they sent.