To date, I also bought only from ADs (in fact, all Pateks from the same Italian AD, except for the 5131P for which I got lucky at a new AD in a nearby town). For these more particular pieces, ADs are certainly better whenever we get a chance (MSRP is much lower, among other factors), though of course I can't rule out buying from select grey dealer or friends in the future, if I wanted a particular piece really bad ;-)
Ever thought of other rare handcrafts (e.g., 5077, or 5089, the 5086 this year, etc.), given that this seems a natural direction your beautiful collection is taking? Cheers, and I hope the 5231 will soon be coming your way!
