I planning on buying a 1985 BMW 325e with 106,000 miles for 950 dollars. First is this a good deal for the car? Second, the current owner informed me that he was driving it a few day ago and ran over a large pot hole. He says now the speedo some times dies between 5 and 10 MPH then come back to life. What could be causeing this problem? Simple fix or symptom of a larger problem? Thank you in advance/