Purchase advice S-Type, specially motor

Hello together, I play with the thought to get me an S-type. will be around around year 2002. austragtung and design are simply outstanding for the price, as I find it. now I want to know which motors are to be recommended? have heard that some models should be very vulnerable. also you will find many with nem motor damage under 100,000 km. what recommendations can you give me for motor? are the really so vulnerable? there are a series of which you can find the fin should be left away? and up to what runtime can you buy a used one? many thanks to gruß chrix