if you want some luxury, high-end or just normal massmarket watches
you should examine the feedback branch
http://forum.watch.ru/forumdisplay.php?f=209
choose your seller
examine his lots on market via the button "find all other seller's lots on market" from his any market lot or "find all started topics" in his profile
then contact seller via forum PM and manage the deal
if you want some low-cost soviet vintage watches - go to izmaylovskiy passage (offline vintage (not only watches) flea market)