Reliable Trek Singletrack Mountain/Commuter Bike $250 OBO

Moving and need to sell my Trek. Has comfortably and reliably gotten me around campus for the past 4 years and in great shape! Perfect commuter bike (light and easy to take on caltrain or Marguerite) or even just around campus. Fast, smooth ride. 21 Speed. Gears shift smoothly. Brake pads recently replaced. Tuned in June. Comes with fenders for rainy winters. I am 5'11", and it's a great fit for me, but I have raised the seat for a friend who is 6'2" and lowered it for friends who are 5'6"-5'8" and all have felt comfortable on it. Asking $250, but make me a reasonable offer.