I went to a ATV/Motorcycle auction yesterday. Needless to say I was very surprised. Here is a run down of some of the prices they were going for:
2000/2001 400ex: 2100-2700
2000/2001 300ex: 2000-2500
2000 rancher: 2400-3500
2000/2001 recon 1600-2200
2000-2002 rubicon 2800-3600
1999-2001 grizzly 2600-3400

There were a few other models that sold. I wrote all the prices down so if you want a particular bike let me know. They did sell Raptors, Warriors, Polaris models, Bayou's. They hold these auctions in Dallas about 4-5 times a year. If you want more info look up vehicles in motion.