I JUST sold my old 13" MBP on ebay for $735 (2009 2.26 C2D w/ some cosmetic damage).
Wow. That's a good price.
I sold the same model for $550 as I've mentioned.
Come to think of it, I should have just listed in the MarketPlace of this forum instead. I had not done that previously because I thought people here are so knowledgeable that they will not have offered more than someone from CL. Guess I'm damn wrong about that. I might have had more luck with fellow members & sell all that for a little bit more than I eventually got.