not much on caddy's but sounds like a sweet deal... although with the bluebook price bong posted, i'd definately have it looked over really good by a mechanic (or if you know how to and what to look for do it yourself) cuz that's over 1k off... and car dealers, used and new want every last penny they can get... and believe me they have the blue book among numerous other things to see what shit is worth... most of the time they even overcharge...

don't wanna burst your bubble, but i'd definately be atleast a bit cautious... seen/heard of way too many people buying a used car, driving it fifty miles before they have to spend a few grand to fix everything that's wrong with it... some of them even have special mechanics that can tune it just right so that it lasts long enough for test drives and to get it off their lot before it breaks down.