1. buy the seller, make sure seller is reputable and you get what you're paying for. since its a 2009 make and new in box, shouldn't be a problem as compared to much older Rolex models.

2.  pricing is very subjective. box, papers, a scratch and a ding here and there, can make price different by couple of hundred dollars.  you need to ask yourself, do you want to save few hundred bucks if you're already comfortable with this shop and want to establish a long term relationship with them?  Also, Rolex prices won't varied much.  In fact be very careful when the deal is too good to be true. 

3 i might be wrong but its probably cheaper in online forums such as watchuseek, the rolex forum.  but again, are you comfortable with buying overseas to save RM1-2k? not to say buying overseas is not good but you won't have chance to see to inspect goods before committing.  Although there are proven overseas dealers that does overseas transactions without much problem..
An example of a very reputable rolex online dealer..
http://www.bernardwatch.com/Rolex/GMT-Master 

http://www.rolexforums.com/forumdisplay.php?f=9  good place to learn about pricing.  Also, look at the Who's who section and you'll identify 3-4 very reputable dealers.  Then browse through their threads and compare with what is offered to you and ask yourself, do you want to save some money but buy online?

all the best!

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Added on February 9, 2012, 9:31 pm
google Slyvester Stallone and Panerai and see what comes up....it used to be cheaper...haha!

Collectorstime?