Although I have been completely through mine, I would say if it is driveable then it should be a good deal if they are not asking a high price. As Nick said parts are in no way cheap and there is a ton of them. 48 bogie wheels, 24 bogie bearings, their respective carrier assemblies, and a myriad of other odds and ends. At the Cushman trackster homepage you can download the owners, parts and service manuals to familiarize yourself with the machines various components. This might also help you know what things to look for before buying. Keep in mind that the drive system will be VERY expensive to have rebuilt, if ever necessary, as high as $4k depending on where it is sent and how far you need to go with it. I did a replace as necessary rebuild and that alone was $750 plus $170 for ups to kick the hydro's to and from the builder. Add to that another $350 for all bearings seals and gaskets for me to build the transmission. I have a couple of lathes and such so I was able to build the required tooling for installing the bearings and seals. Looking back my machine was way too far gone for anything other than saving a good Honda GX 620 and a few bogies. And although it is driveable now and we are doing the usual "after build bug killing" I have yet to truly test it for fear of something breaking... It has however been the biggest build it challenge of my life.
DESTRUCTION is just a couple of vowels down the street from DISTRACTION