Even better than the “Refund later” idea, since some of those watches have a higher value on the grey market.
Waitlist be damned, if a customer walks in with 1MM in cash I’ll sell him everything I can. Think of the sales guy’s commission, that’s nothing to sneeze at either (and won’t disappear later).
There is a comment on “that other site” that goes in detail about what to do. It starts with “You’re fucked” and shows that you really have to be careful who to trust and what to do to not be bankrupt in a few years. I’m on mobile and short on time, but it’s worth reposting here.