You know, I once considered refurbing SS's and reselling them but sadly if your goal is to make a buck there is far more $$$ in stripping them down and selling them for parts.
One parts seller once told me that he could even buy a new one and make money parting it out... I have no idea if that is really true or not, I never put a serious pencil to it. I do know that if professionally and cautiously pursued the parts business can be very profitable. It can of course be a lot of work, not a free ride. Shipping can become a PITA as can a few customers.
I did not equip with Shopsmiths in spite of the setups but because of them.
1 1988 - Mark V 510 (bought new), 4 Poly vee 1 1/8th HP Mark V's, Mark VII, 1 Mark V Mini, 1 Frankensmith, 1 10-ER, 1 Mark V Push-me-Pull-me Drillpress, SS bandsaw, belt sander, jointer, jigsaw, shaper attach, mortising attach, TS-3650 Rigid tablesaw, RAS, 6" long bed jointer, Foley/Belsaw Planer/molder/ripsaw, 1" sander, oscillating spindle/belt sander, Scroll saw, Woodmizer sawmill