I was thinking used electric but I like the idea of a manual even better. Won't be long before I'll need the assist......
It doesn't have to lift much weight, 100lbs? I think those camper lifts are expensive because they have to lift some serious weight. I think you are after rapid travel rather than lift capacity.
There may be even cheaper but I found this:
http://cgi.ebay.com/ebaymotors/1000-lb- ... veQ5fTools
You probably know this but be sure to have a pad up top, maybe 6x6 1/2 plywood or a 1x4 strip.
Tom