I stumbled across what I think is a pretty good deal on a used vxl slash. A teenager is selling it, desperately wants 200$ for a 4 wheeler part he broke, he is my little brother's friend so I want to make sure I give him a fair price. Car is a few years old but overall in pretty good shape, everything works and car has quite a few upgrades and extra stock parts as well.

Upgrades - Servo to metal gear Traxxas servo Light kit Several rpm parts Metal a arms - I don't like these but stock are included

Extras Extra body 2 extra sets of tires Extra stock parts Pinion/spur gears Bearing kit Hardware kit Traxxas 2s battery and charger

So I'm planning to check it out this weekend, and am just wondering if 200 is a fair price. Also, any good advice for specific things to look for when buying a used RC?