Everyone seems to have their own idea on how to launder gold/items you have just stolen. Some way too simple that don't work, and some over thought. I have used this method every time I steal a guild bank, TCG scam, or backspace scam a high price item. This will be 100% safe from banning your main and you won't have to deal with the hassle of the AH.
What you need:
-a second account (no way around this)
1. The items you want to keep should be first on your second account, say toon A has just got everything you want to keep.
2. Create a toon B on your second account.
3. Mail all of the items you want to keep from toon A to toon B.
4. Delete toon A.
5. Remake toon A with the same name.
6. On your main account, create a toon C.
7. Open a second wow and meet up with toon B on toon C.
8. Trade all of your goods from toon B to toon C.
9. Delete toon B.
10. Remake toon B with the same name.
Why this works:
The data that is saved about a character under level ten is deleted when the character is deleted. This is the reason why you can create a new character with the same name right after deletion but you cannot do that 10+
I have used this for as long as I have scamed any gold or items and have never received any ban on my main account but I cannot say the same for my second account. Make sure to make the ban/suspension on your second account worth it by trying to stay over 5k worth in gold.