Personally, I don't believe I could pull the trigger especially if it is a relatively recent piece.
Since 1989, the limited production pieces have become far more frequent and there is no reason to believe it will not continue .. a celebration of the new facility, anniversary pieces in 5 or ten year cycles for iconic or very successful production pieces, etc.
Of course, if this is THE watch, then you are the only one to assess its value and make the decision.
Not an easy one but it certainly seems as though you have already made a preliminary decision, just seeking opinions. Take your time, anyone else considering it will have to be questioning the premium as well.
Best of luck!
Whit