A 79 AMC Concord. Bought it used in 83 when our second car died. It leaked, it rusted and I don't know how it lasted three years with us. It got me to work and back but you'd never take it more than ten miles.
My fave? My 93 Saturn SL 2. Just sold it this past March. It had 140K. Replaced the alternator once and nothing else but brakes and belts and hoses for 12 years. And it handled wonderfully with surprising oomph for a 124 HP.
I had a '94 Saturn SL2 that I bought for $3300 in 2003. Terrific car. I sold it to my dad for about $1500 and I now have a 2001 Toyota Celica GTS and a 2005 Chevrolet Avalanche LT 1500. While my current vehicles are much nicer than the Saturn or any other cars I owned, it was a GREAT college car, and I have fond memories of it.