Before I bought my E65 I had a 97 740iL and to say the least it was absolutely amazing. Service records would be a nice thing to review to see what has been done to the car and what you may need to anticipate in the future should you buy it. The thing is being that it has 170k on it you can assume that wear and failure items have already been dealt with such as the cooling system, possibly cats, suspension issues etc. since most of them tend to come up prior to that point. Definitely find a reputable independent mechanic who knows what he is doing. Granted they have their problems like any other car but these are amazing cars to drive.
1995 BMW 325is
-Fully Rebuilt M52-Ported & Polished-ZF 5 Speed Swap-M50 Manifold-CAI-M3 Exhaust-Rokkor Coilovers-Polyurethane Bushings-ZHP Shift Knob-Sport Seats-HD Lip-Cross Drilled & Slotted Rotors-Cool Carbon Pads-Euro Foglights-DJ Auto-Clear Lights-M Tech Side Moldings-
Cars: 2004 BMW 645ci-1999 BMW 528i-1995 BMW 325is-1989 Mercedes-Benz 560SL-2001 Dodge Ram 2500 Turbo Diesel