Post ads around campus that you're looking for an inexpensive but dependable ride. You might find a sweet deal. If you must go the WallyWorld route just to get some transportation, have a friend who knows bikes adjust and tighten things up. No need to spend tons of cash just to get riding. One of my cleanest bikes is my older brother's Schwinn that he bought new in '78, and many years later gave to me free. All I had to spend was some time and buying a few parts to make it look and run great.