X Carve for sale. Upgradeable?

I’m looking at purchasing an older model from marketplace. Only one photo on line and owner doesn’t know what model. He wants $600. Anyone know if this can be upgraded or if it’s worth the price? Thanks!!!

I understand that is a gamble if he cannot show it working. However if it all looks to be there, the belts and wire look good, I would take that gamble. Worst case scenario would be a bad controller. One can be made if you need to.