Especially when it comes to Patek Philippe, people focus a lot on the value, the speculation etc... This is natural I guess but I think it should really come back to how a watch pleases us.
There are many novelties I saw from Patek or other brands that were quite appealing but not the ultimate excitation. When you come in front of the ones that bring the 98% excitation, then they are worth considering buying.
If not, then it is worth waiting as many years as needed.
Cheers, Mark