I mentioned to a friend that I bought an FC Twin last weekend and he asked me if I wanted to buy his SNES collection. Initially he said $25, but went up to $40. I think what I got out of it is worth it though. Almost everything came with box (generally in great condition) and manual. Plus there was some NES stuff in there!
Here's an overview of the haul:

Here's a close up of some of the SNES games, including a boxed Mario RPG and Zelda 3

Here are SF2, SF2 Turbo and SSF2. With my Fighting Street and PCE SF2, this is a decent SF2 collection


Finally, here's the NES stuff (not including game genie):

Not bad for $40!