Step 1: Spam WTT (60 CLASS HERE) for (w/e u want). Say you have pretty nice  gear.. I usually go with full tier 1 6/8 tier 2.
Step 2: Get your  victim.
Step 3: Talk to them on aim or w/e.. tell them that you'll  transfer your character to their account and theirs 2 yours. and that you will  pay for it all. If they say 'horde and alliance dont work on the same pvp  server' show them this 
http://img96.imageshack.us/my.php?image=alliancenz6.jpg
If  they say 'Last names on accounts need to match' say 'Na, Blizzard just doesnt  approve of it so dont tell anyone or we'll get banned.. read this,  
WARNING: You may only request character transfers from one account where  you are the subscriber to another account where you are the subscriber. Any  attempt to transfer a character from an account where you are not the subscriber  could be considered a violation of the World of Warcraft Terms of Use and could  lead to Blizzard taking disciplinary action against your account, including, but  not limited to warnings, temporary account suspension, or permanent account  suspension, as determined by Blizzard.'
Tell them you'll need  their user/pass and you'll enter your credit card info. When you get it go 2  parental controls, and copy Verifying your account and the SQA.. tell em you  need it... dont stop there... type 'LAST STEP!' type their email, and put  Password: under it. It's amazing how gullable people are and if you get it...  change it.