ya but you need to upgrade the accounts to do that dk thing. Unless your going lvl a team up from 1-60. I'm pretty sure you cant move a toon from account A (that has all 3 expansions) to an account that has just vanilla wow.

I bought 3 battlechest for $15 each. Going to recruit a friend, update and all and move my toons over to those accounts, then use my wrath codes. I'll get 3 zebras, with about a $5 cost in the end.

$15 for a copy of wow+bc, you get 10day trial (figure about a worth of $5, if you go with $15 for a month of wow), plus a free month ($15) on your main account, which your going to pay for anyways). then $25 to move the toon to the account. In the end it's about a $5 lose over the span of time.