Guys there is simple rules to selling gold:
1. Don't trust anyone.
2. Don't sell what you can't afford to be scammed for.
3. Don't use any account that you possibly care about, use vanilla accounts to trade through a mule toon.
4. If the price is too good then its probably a scam.
5. Find a private buyer and establish a good relationship it can lead to more buyers!
6. Use forums where people build rep as its more like ebay in that way as people don't want to lose reputation over small amounts of gold if they decide to scam sellers.
7. Common sense use it! People get silly and don't think things through properly.
Have fun!