Good points. Based on similar machines for sale I feel like the clausing is worth more than $600 even considering the repairs it needs.
I have the equipment to move and load it, after that its really up to the buyer to know if they can safely move it.
I will get the Enco up and running, then I will know more. In fact I'll know more than I do about the Clausing, I have a small motor that will at least spin the gears on the Clausing which should give an idea of its condition.