I recently just duped about a 1000 Gold, and this is how you do it, I'm warning you now though, its not easy and only do it once..
Ok what you do is on your account you vendor all your gear, and send all your gold to your friend, then log off and delete your character. Then maybe about one hour later you go on a level 1 character and page a GM saying that you got in a fight with your brother, and he went on your character and deleted it. Give them about 8 hours, and they will restore your character back with all your gold, funny thing is they don t take away the gold you sent to your friend

If that doesn't work and you need gold quick, I recommend The MMORPG Exchange WoW Gold. They deliver quickly and are cheap! I usually receive my gold within 20 minutes. They're my secret weapon, I highly recommend them!