I think that sometimes certain valuation is beyond any plausible reasoning, which is rarity or complication. Same fate that has suffered the Zenith Cairelli for some months now, after an auction "imaginative" all trying to sell the 12k up is assigned or not.
It is important that each of us have in mind what you're buying and the real value to be attributed.
When certain asset bubbles will come to an end we will return to more appropriate values.
The Heuer 1551SGSZ is one of my next goals but certainly a more humane price.......
Roberto