Well, knowing something of the early (1950s and 60s) Tucker Sno-Cats, and I've also owned a '96 Pisten Bully 280, there was a SERIOUS problem with the torque such tracks apply to esp. the axles on what was, essentially, a light pickup truck chassis. And on this rig, it very definitely is a light pickup truck. But... if it works.... that price is a lot less than what a new set of Mattracks would go for, even though with Mattracks you get tracks under all four corners, not just two as in this rig.
If you're lucky at auction, you can get Mattracks for about that or even a little less... and then you also have use of your vehicle in the brown season when you put wheels back on.