Watches are not watches anymore, this has been the case for some years (decades?) now. The watches you mention are luxury items, fashion items, social items, etc... not simply functional watches, used to tell the time. BTW, vintage or modern, it is the same boat. These objects degenerated from their primary function long ago, so it is somewhat "normal" to see their prices float around. Some watches are cheap compared to what they are (vintage pocket watches), some are ludicrously expensive regardless of their various qualities (or lack thereof)...
Personally I tune out north of 3k, my own limit. Anything priced more than that, enters the realm of dreams and theories... Veblen goods, smoke and mirrors.