I think that the Daytona decline has to do with a lot of factors. I have owned 3 (modern) in my life, the first 2 were sold because I was offered crazy money for them. I was only fortunate enough to purchase the 3rd because I also had purchased a number of other watches from this perticular AD. I honestly think that Rolex has upped the list price too much. At $10,000, the list is just too high for the watch. Just because you can charge that much doesnt mean that is the best for the piece in the long run.
Even the vintage market has lost its share of fans, including myself. I love the "Paul Newman" Daytona, I think that it is a great looking watch with a fantastic line of history. But the chances of getting a Fake model are just too high. I was once in the market for one, but I am now so scared of paying for a fake that I just cant bring myself to make that kind of investment in it.
Its a great watch, and my favorite every day watch, but it seems that Rolex has gotten too greedy about the price at the wrong time.