Posted this one here before, but last year we found this '93 325i for $1200 and drove it home for my kid's GF.
It's needed a water pump and a coil pack and a basic tuenup, but that's it mechanically. It also needed both front window regulators because the PO trashed them trying to install a **** stereo system. Luckily he hadn't had it long enough to truly trash it and was using the money to go buy another Civic. It's been a good car for her since we got it.