Looking at a used Yamaha Rhino

[mazdaparts]

I'm looking at a used Yamaha Rhino my boss is selling. Its an 04 model with 31XX miles, 319.X hours. It seems to be in great mechanical shape, runs great trans seems to be solid, 4x4 and diff lock seem to work. I did notice it can be hard to start at times. If you pump the throttle it fires up. But this doesn't happen all the time, any other time it fires up almost before it makes a full revolution. It looks like it was parked outside most of its life as the plastic is faded, but it does have new tires, metal roof and glass flip up windshield. Got the boss down to $4000 for it which is right in the middle on nada value.

Any thoughts or things I should look for/at? I'm really close to pulling the trigger on it on monday.