For + and - all the usual rules for a used car apply. The mileage looks great. Have your kid show you how to use the Search function on the tool bar right under the VX drawing as their is far too much too list and it has all been documented and stored by Moncha. (He who must not be offended)

In my opinion I would first look at any mods and how they were done. Owners run the gamut from talented to more heart than skills and these are the types of things that can affect the performance. Also the type of 4 wheeling affects what you want.