Ebay rules! <img src=icon_smile_big.gif border=0 align=middle>
I got a PSE Centerflite 1000 (lefty) compound bow off Ebay for $75 bucks. Granted, the guy stripped it down (the sights, rest, quiver) to use on another bow, but, this PSE is perfectly aligned square and true. When I got it, I immediately took it up to the shop and they checked it all over thoroughly. I added about $75 more bucks to it to get it fully outfitted for me. No problems at all!
I would assume tree stands could be the same thing. Somone might get a new Summit climber, and auction off their old Ol' Man hang on stand, which is still in good shape. You never know. But, you really have to check people out on Ebay though. Some people can be real shady.
Butch