If you'd like to buy the Nikon 1 J1 in Thailand, then we suggest buying it in Bangkok by going to MBK and looking for camera shops such as Foto File, Foto Thailand, Big Pro Camera and the main Canon store on the 5th floor..
You could also try Pantip Plaza or Fortune Tower.
You will almost certainly not get ripped off or end up with a bogus version if you shop at larger shops within MBK and Pantip Plaza. Smaller stalls might sell the camera at a lower price but check the contents of the box and be sure to witness them opening the box in front of you. Check and test the camera before hading over your money.
Warranties are often international warranties, but be sure to check.