Mongoose NX 7.1 Pro Men's Mountain Bike
Price: $200 OBO
Size: Medium
Parts: all original, except for the rear wheel - this was replaced in the fall of 2012.
Additional: comes with the carrier rack seen on the back. I also have a spare front wheel if you're interested in grabbing that as well.

I've been riding this bike for a fair few years just as a commuter, and it's been great. Only reason I'm letting it go is that I'm leaving Stanford and don't have room to take it with me. It's a tough customer, and I wouldn't be at all surprised if it continues to provide a great means of campus transportation throughout a few more Stanford degrees n the future. Brakes and shifting work great, and the chain has been lubed fairly regularly so is still working fine.

Let me know if you're interested.