Yes! You're definitely able to do it. I just received mine from RSorder It was a great purchasing Experience for me. I received my 300 million OSRS Gold in just three minutes. The process is simple too, just place an order and pay for it.
After I spoke to their customer support team and was advised of an exact location and specific person to be looking for, and when I arrived at the location, it was clear whom I needed to talk to first. In just a few minutes my gold order got transferred over to me, and I was able to buy higher quality armours and weapons to use as my primary.