Gold websites for buying?

Hello everyone, I am wondering what websites sell gold. I did some web searches and found more than a few sites. I have never purchased gold from anyone from anywhere. I have made it to a pretty high level and I really need to upgrade my protector set. It might take more time and a lot of money to sell premium items to gain gold. I’m not asking anyone here to sell me gold. I just want to know a website that does sell gold. It took me a very long time to sell premium items to gain gold and I spend it so fast. So what websites are real and actually deliver gold? What forms of payment do they accept? Thank you and happy gaming