So what do they do with all the trade-ins I've done that were disk only? Ship them to a store, and let some sucker buy them there, I guess.
One time at Pawn exchange, I found Dragon Quest VIII with two copies of the game inside, one in the normal slot, and one in the slot for the FFXII demo. Traded it in as two games. It was awesome.
Belgarath the Ancent One