Search through our older posts. There are some great "pre-purchase checklists" from the experts @Harleyguy and @FiskerPhilly that have been circulated in earlier posts multiple times. Also, recommend you get one of these guys or some CSP to look over any potential car, and learn about what fixes/recalls have been done or not on your possible car. But, generally, you can best trust any car with significant miles (15K+) or ones with later VINS 1800 or more?
If you are in Europe, buy it from Europe, preferably in the country you are in. Shipping from the U.S. to Europe is a pain indeed and different countries have different emissions regulations and you never know until you actually get your car in front of the customs guy. If in EU, buy from the EU to be safe.