Like the number 1 piece of a Romain Gauthier HMS, a piece unique Moser perpetual, an NOS Vianney Halter Classic, a titanium Voutilainen, etc.
Some just came at the wrong time that I don't have the fund ready; some came at the same time that I have to choose one over another (even the choice can be a nightmare); some just vanished too fast during my snooze...
But nothing compared to your list my friend...the modern piece always has a second chance...
Happy hunting!