The RSorder website is the most reliable for RuneScape gold 2007 (both OSRS and RS3 Gold). Based on my own experience (12 years with RMT as an occasional buyer and seller) I have discovered that it is the safest site available. It allows you to trade only between other members, which means the costs extremely low and transactions are safer. It's difficult to know where the source for the precious metal, however If you could locate a legitimate seller of gold, it's RSorder or any other marketplace website. The majority of stores on the internet can provide something similar.