Tips on trading or selling/buying characters cross-realm.

I have a mage (Darkbright) on Outland that I have put quite a lot of time into, but I'd consider selling/buying or trading for a character on Icecrown.

I don't really what the best way to go about this is. A direct trade with someone, or just selling this char and buying another. Any tips or help would be greatly appreciated. Thanks!

For the time being you would have to post it on the realm's trade system that the character is on. One it sold you'd be able to apply those coins towards a character on the server which you want to start playing on.