Hahaha...a refurb part peddler picked a fight with two moderators!
Well at least it's fun reading about the X5680. If the i7-2600K had dual QPI buses, I bet more than a couple people would be building dual chip builds for bragging rights.
I'd wish you good luck with the sell OP, except that it seems like you're trying to rip people off...either that or you honestly think a close-up of the bottom side of a processor is something special. If that's the case, sorry for being rude--but google your part a bit before you try to sell it.