Yeah I could never afford one but I would love to give it a try. I once saw plans online for one that was controlled with a bike peddle like system. It had the same kind of set up as a bike chain/ peddles. You layed down and peddled and it turned a series of wheels which were attached to a dildo. It looked a little awkward to operate but in any case I would love to try it. I have not been able to find plans for it again but as machines go, it would be fairly simple to build and would not cost all that much as there are no really expense parts. I would guess you could build a cheep one for $100. I don't know though. I live in a small apartment and would not have any place to put it.