Well, went to look at it today. The dude is pretty firm on the price, and cosmetically, it's pretty beaten up. Lots of rust, scratches, and dents. He was so surprised that I actually called him, as he's had the ad up for months and only had one other call. I straight up told him, "Sorry man, I don't mean to insult you with a low offer, but KBB dealer retail on this thing is about a thousand bucks. I can't see sinking $800 over retail into it, putting myself upside down right off the bat, with no consideration for what I'm gonna probably wind up having to spend on it in the near future, given that it has 5500 miles on it, and everything is original. Thanks for your time, good luck with it."
Thanks for all the thoughts. The thing was pretty beat up for what the dude is asking, but the sled was located literally two blocks from my house. Back to the search (which is half the fun).