3 guys can easily lift a bed and walk it to position, without breaking a sweat. 4 guys and it's a piece of cake.. I'm guessing, with the tail gate off, 300# .
Build one of these and do it yourself, one man show.
You must be registered for see images attach
Or, just put a nylon strap on each corner pocket and hook it to your engine hoist. [not quite as handy as the tool in the pic]