Steve,
As many members have already pointed out, even a brand new machine without its specialized tooling is worth close to nothing.
Even assuming that this machine is indeed like new (I don't know that rebuilder and have no idea what kind of a job he does), does it come with all the arbor supports (inboard and outboard), at least a vertical head (with matching spindle adapter), etc.?
I'm not sure about your level of expertise and experience with "real machinery", not the hobby shop variety. But I would strongly discourage you from getting a machine like this, unless you have already some experience and mileage with a mill having a motor larger than 1HP.
Unless you have the need of removing a lot of material in a hurry in a production setting, a machine like this without much tooling is not going to be satisfactory, even if it is truly brand new.
As hinted by several members, you'd likely be much better off buying one with more wear, but fully accessoried from somewhere in the Rust Belt and having it shipped: the total cost would be less than this one and you'll have all the accessories you would need. Unless you need sub-thousand precision while removing cubic yards of material, by the shear mass of these monsters you will get a decent result even from one that hasn't been rebuilt, granted that all the gears and bearings are in decent shape.
Paolo