Yeah. I was always amazed with how people would take peanuts for their games when I was working at gamestop. On newer games they offer a fair amount if you pay attention to specials. But clearing out your last gen collection is not really worth it, unless you have something rare, and even then you might want to consider ebay.
It is great though if you get a new game and realize within a month or so that you will not touch it again. Did that with Heavy Rain, Borderlands II, Forza Horizon, and the FF13.