911 Buying used 1999 or newer.

I am thinking of buying a used low mileage 911 upon my return to the states in February. I am not an expert on Porsche's yet but am learning. I like the newer style which started in 99 if I am correct because of the comforts inside and the outside looks. I have been looking on line and also on Ebay to learn prices and options.

So, how do people like the tiptronic auto?

What is a going price for a nicely loaded 911, 911 with AWD, and a 911 Turbo? I do not like convertibles so I would be looking for a coupe.

Any advice would be greatly appreciated.

Thanks,

Paul