ORIGINAL: hardcorehunter
Quiet, lightweight, comfortable, and easy to hang. Basically the Lone Wolf Alpha Hangon but sold at 1/2 the price.
While you're at it, I want a Mercedes S55 for the price of a Ford Fusion.
And I wouldn't mind a Movado watch for the price of a Fossil watch either, so if you can fit that in your schedule put me down for one.
As other people touched on already - be very, very careful with making sure you're covering your butt on liability issues. I would unquestionably contact the TMA if you're thinking about commercially distributing and selling any treestand. They're probably going to be your best source of information on what is required to keep you out of trouble.
http://www.tmastands.com/