Neato Botvac 80 (Scratch & Dent)

I’m tempted to wait until some of the better Botvac units start to come out on refurb prices. I had a couple of the old Neato XV-21 Pet & Allergy units and each one seemed to last me about 1 year with no problems and 2 years after I took it apart and rebuilt it. does anyone know about how this works, or how it handles being rebuilt? Thanks!