Purchase advice

Hello, I love to fulfill a boy’s dream and buy my gift for the 50th prematurely: a Mercedes SLK. Key data: SLK 200 compressor or SLK 230 (preferably) NO automatic color: NOT silver and NOT BLACK Price: maximum 12,000, prefer less mileage: not too far over 100,000 dealer’s offer preferred (have little idea of cars, guarantee would give me a minimum of safety) This SLK:red SLK would meet the above criteria with the exception of the running leist my questions: a) Can you buy a car with this mileage without having to accept immense repairs from the outset? b) What do I have to pay attention to? c) Does someone know the dealer? Thanks Andreas