I have been looking for some time for a 450 SLC in good condition. Finally I have found one but, having looked at the history, it seems that the low mileage which attracted me to the car is slightly dubious. Basically an MOT certificate in 1984 states a certain mileage whilst one earlier states a higher figure. This seems to coincide with a replacement of a speedometer in the car in the early 1980's. Does anyone have any knowledge of, firstly, how I can check the actual mileage of the car, and secondly, how this state of affairs would impact on the re-sale value of the vehicle ?