I'm from Germany and want to buy cars (used Porsche) in the US. Can anyone tell me where to look for the best cars in the internet, please. I already know ebaymotors which is a good site. Also autohopper and autonation(not so good, IMHO). Are there better places to check cars? Apart, is there a region where I can buy cars cheaper than in other regions? I consider to fly to Florida due to the weather.