I have found a 92 525i touring for sale. About $9,8500. 150,000 miles. The gentleman owner has said that it had a slight slipping when it shifted at times. He checked it, saw that the plug was wet, assumed it was low, drained it and filled with red-line auto fluid, and said it hadn't slipped again. I am in Fort Worth and the car is in Pennsylvania. Is this a good deal? I plan on flying there and driving it back. Any input would be greatly appreciated.