[por356c]

Its hard to get better advice than what Mike Foche, JayG and Husker (Terry) provide. They are the best. I would only add some additional thoughts/opinions:
1) Buy the very best car that you can afford. Don't try to go on the cheap. You'll only get frustrated.
2) Have it inspected, period. Even a seller that you may know or trust very much, may not be aware of something wrong.
3) Don't kid yourself, if you are not a DIYer, plan a maintenance budget. These cars do need maintenance and the maintenance is not especially cheap.
4) Probably the most important aspect is don't buy one of these without a detailed maintenance record. This tells you what has been done and what needs to be done.
5) Get the IMSB work done. Some may disagree, but peace of mind is worth a lot. Figure the cost into your purchase price.

Good luck.