Don't just sell a place and sell it. If you don't, you have to be named. If you are worried about being cheated, you can exchange it with a friend. Maybe he has something that you don't have.
The safest way is to trade on the GameMS platform. After all, personal sales are very insecure and inconvenient. I personally bought WoW Classic Gold on their GameMS platform. I bought it a few times, very fast, and there are no security risks.
It is understood that all the gold coins here are their own staff members in the game, and some of them are sold by the players, so your WoW Classic Gold can also be hung on GameMS.