I have 4 mechanical wheel dollies for sale. I used them to position my boat in the garage at our old house, but now I no longer need them. I probably used them 8-10 times. I got them from Harbor Freight and paid $80 each for them. Looking for $70.00/ea f2f. They are in perfect working condition and you can get details on the harbor freight website. Arlington/Mansfield area, but frequent Fork often. PM me any questions.