Even used, my 1991 BMW 325i convertible is the ultimate driving machine. This model was built to last, unlike newer versions, and it is a tank. I got it on the East coast with 75,000 miles and drove it out to Los Angeles (where I live). Even in the brutal stop and start LA traffic, my BMW has been a champ.
I'm coming up on 4 years with her, and though I've only managed to rack up 20,000 miles (odo will hit 95,000 soon), I drive nearly every day, and have driven many long trips with great satisfaction.
My best advice to new owners of these used gems is to find a reliable and reputable BMW/German car mechanic. I adore mine (Walter at N&W German Auto Repair on Pico @ Fairfax in LA). These cars are easy to maintain and require attention to scheduled maintenance, but by no means are they delicate.
I am a pretty rough driver and my Bimmer has always risen to the challenge. If anything, the ride only gets better as the years pass.
Amount Paid (US$): 6,000
Condition: Used
Model Year: 1991
Model and Options: 325i convertible, automatic, leather