The mmowned.com website has tons of scamming and buying free wow money links so check them out for sure.
To make sure you dont get banned in the long run follow these guidelines.
1. Create new character
2. Run the newbie toon to your nearest town like ORGimmaar, IRONforge, ThunderBluff etc.
3.Go to guild master and get a charter get 10 people to sign your charter.
4.Once you get the guild buy a guild bank i know your all saying "WTF newbzor im not doing that its like 100g !!!" But believe me 100g is the safer than the new toon delete new toon process for money. This also saves you from getting banned.
5.Have the guy transfer money into the bank. Then get money out of bank.
6. Bathe in nice warm water and enjoy your uberness of losing real money for wow money woohoo !
This is the safest way i know
My 1st guide so hope you like it .
(Optional) You can delete the toon and remake same name to make sure its extra secure