 Purchased our 2003 530i a little over a year ago.  Got it for $5K and at 130K miles.  I do most of my own repairs and I've never seen such awesome engineering on a car.  It's a pleasure to work on if you are into car repair.  Driving it is a real thrill that never gets old.  We've taken it on several long trips and it just loves the open road.  Seats are amazingly comfortable.  Usually back seats are a weak point in most sedans but this BMW has very comfortable rear seats.  Gas mileage on a combined city/highway commute is about 25 mpg.  For a 24 valve 6 cylinder that is very good mileage.  Hope to keep this beauty for the foreseeable future.