I have in the past, the store here seems to mark all of them around 19.99, have not found any gems there either. I do not beleive they accept trade ins (never tried), more of a rental then sell off the extra for $20 bucks to free up shelf space kind of thing. Sorry, but I cant see paying $20 for used "greatest hits" copy of a game, that is priced $20 new. Others may have had different experiences, maybe they can share as well.