Gamestop hasn't taken in N64 in probably at least 11 years.
I go on about this a lot so if you read this before then just skip it.
I'm spoiled for choice on local stores, but I predominantly go to one of them these days. Everywhere checks online but only one store here really bothers to be fair, so that's where I take my business. One of the other stores though prices based on Gamestop's system. They have fixed some of the really valuable PS2 titles but it's still a gold mine for certain GBA and PSP titles when they get them in. Especially when the PSP games are complete.
Can't believe he didn't come to me first.