Calibra purchasing advice

Hi guys! I come from the “Kadett corner” and would like to buy me a Calibra. my question is, what is to be considered (as a body builder is rust not sooo the problem)? which engine is most recommended (reliability)? I think they are all fast, but he should also keep, since he would be used in everyday life. what can such a car cost? thank you in advance greeting from köln