I would buy this Ritter sander any day of the week over everything posted. They make serious equip. If shipping make sense or drive down to Vegas, you might come back with the machine free and some extra cash in your pocket. Always bet on red, but I am not a gambling man
https://www.ebay.com/itm/Ritter-Edge-Sander-With-End-Station-Dual-Sided-/323256483565