So of course you better provide a list of your previous Pateks if you want a good piece, but then I believe an AD has some good degree of freedom in choosing their own allocation strategy, which I find a sensitive policy. I agree it might be risky to allocate such a piece to a first-time buyer (in principle, I could have just bought the 5131P and disappeared), but when the AD then is able to fidelize that new client, like in my case, it is a win-win situation. I would have *never* started a long an expensive "Patek relationship" with some new AD in order to get a 5131 after many other pieces I didn't want, like virtually all ADs in the US seem to require before giving you a "big" piece.
Best wishes