Request for advice on purchase of Ford Mustang 3.7 V6

Hello to all forum members I am currently looking for a mustang and I have already found it. Since this would become my first mustang and therefore I lack some experience, I would be extremely grateful if you could help me further. I have already studied various materials on the subject, but would be very grateful if I could be listed by the far more experienced people who are represented here, a short summary of things that should be taken into account during or before the purchase/inspection. Mainly it concerns me about you familiar Macken, reasons for non-purchase and possible – by the seller – hidden problems. I hope you can advise me in my project and thank me in advance for all the answers. Greeting Richard