Sudden Impact is probably the best place around Boston for Turbob now.
HA! Last time I went he had about a dozen or so of all common garbage. Maybe he has acquired more since then, but it doesnt really matter. His prices are so far off the wall it's not even funny. You would think with the amount of stuff that is packed in there, he would want to part with some of it. It is a retail STORE after all.
To give you an idea, on any given game, take the highest eBay sale of the last year or so and add 30%.
I know some places leave room to haggle, but that place is crazy.
I saw GameCube metroid for something like $55.
And best example was he had two loose mighty bomb jack carts for NES. One was priced $11 and the other $17. Why? Because the label was in shit condition on one of them. Nice job buddy, way to split hairs on a game that should be $3