If you want to wear the Nautilus, why don't you buy 5712? If you want to speculate with the future value of the watch, it's another issue.
However, the world economy does not look too bright. In Europe we have still Portugal, Spain, Italy, Belgium... If the problems with these counties can not be solved, we will end to a situation where the whole global economy will be shaking. Then the speculative values of watches are just what the expression suggest: speculative.
Best, Kari
its already double the retail.... not sure how much further, especially in light of the 5712...
personally, buy it if you really really like it, or hold on in case anything good from basel
Best
Imran