How much is my atv worth?

I have a green 1999 Polaris Sportsman 500 4x4 with IRS (Independent Rear Suspension). Not sure how many hours are on it, but it runs great and starts up immediately after a months in storage. The rear rack has medal trim around it and it also has a rear winch. Also, the thing where you stick your feet is broken, it has a chunk that cracked off because my cousin hit a tree. It has a brand new belt in it too. Tires are stock and still have lots of tread on them.