I will be in Greeneville on Sunday, and I will have a friend from Asheville there.
There's a couple of caveats. I will be getting to Green Evil on Sunday morning, so it may be hard to meet your seller then. And my buddy will likely be able to take it back to Asheville, but the last time I had him bring something from there for me it was a bit of a pain for him, so I hate to ask. I have yet to spring it on him, so we may be looking at a relay still. I don't think it will be a big problem, but we need to make it as painless as possible for him.
Biggest thing now is finding out where your seller is and where he can meet and when. Best time for me will likely be around 9:30 Sunday morning, somewhere along 11E, but many people in G-ville are busy at that time.