i had one i paid 1000 for, it was used indoors, 2 post lift, each side was only 8.5' high. came with all the service docs and owners manual. I sold it for the same amount when i joined the army and never even got to install it. but now another member here has it, lol.
I would just asked around at shops that are either getting remodeled or under new management. They might not have even thought about selling it yet or what its worth so u may get a good price. Mine came from the shop that took care of my SS warranty when the engine blew. double win