Trek 8500 Mountain Bike – year 2000
Retails for $1,639.00 (new)
Selling for $400 obo (in pretty good condition, not perfect)

I used it for mountain biking, and for commuting around Stanford. Act quickly!

Pictures and description of the model can be found here:
http://www.bikepedia.com/quickbike/BikeSpecs.aspx?Year=2000&Brand=Trek&Model=8500+R&Type=bike#.UCmHAkRvxVs