Good deals do appear in local fora, grey BNIB's and used. Grey sellers need time to get the watch shipped in though.
http://www.sgrolexclub.com/forums/4-Rolex-Garage
(you need a login here)
http://swx.com.sg/forum/forumdisplay...re-Trading-Pit
Also check out http://www.jwwatch.com.
John always has some BNIB and used pieces. Trusted and offers good pricing. Open only on Thursdays and Saturdays (12:30-4pm)
Rest of the used watch shops are China Town have loads of rolexes, but their pricing is higher in comparison to local forum pricing.
This guys is a Rolex AD, and has a few BNIB or NOS discontinued models apart from the current models.
http://www.rolex.com/rolex-dealers/d...lexdealers.com
Pricing is a bit crazy but if he feels you are genuine buyer he will negotiate.
Good luck and happy hunting.