As far as I can see it, just reverse the trade. I don't see how this can be THIS HARD. 9 pages of bickering over if it's a Sterling or a Pewter, calling everyone out, making all these demands... Why is it so hard to just say "okay, send me my snake and I'll send you yours and that's that." To me, it seems like the guy who traded it doesn't WANT it back.
I'm probably in the "younger" crowd on this forum and even I'M shaking my head at this ridiculousness. We're all SUPPOSED to be adults here. This seems like a case of making a mountain out of a molehill, in my opinion...
EDIT: supertiger retics, here's an idea. Instead of acting middleman between venom and Adam, why don't you get Adam to speak directly to this person? Not point fingers at anyone, but having a person relaying info to everyone leaves a lot of room for doubt on whether the info is truthful or if someone's lying.