The keyword is "leftover", especially in this economy. Porsche's website will link you to the inventory for every dealer. I focused on searching dealers close to major metropolitan areas figuring they would have more inventory and, consequently, be more willing to deal. The dealer I found in Ct had 10 leftover Boxsters on their lot - it was early January and they had just gotten their first big dump of snow. In less than five minutes on the phone they had accepted my offer and taken a credit card deposit. Got a one-way ticket up there and had a fun road trip home. Two years later Juice applied the same approach and enjoyed basically the same savings. In his case he elected to have it delivered. I doubt you will find that degree of discount on a 911, maybe not a Caymen either, but the fundamentals of finding a good deal still apply.
100% agree with Waldo on the mid-engine - it's the purest expression of a Porsche and the handling is superb.