Ravinar, if you do decide to go ahead with this and take the chance, be sure that ALL negotiations are done through in-game chat. That’s the only way Blizz would be able to look into a scam if it came down to that.
Do not trust anyone not willing to discuss it through in-game chat.
As for the conversion, if I was going to do this for someone else, it would be at a large premium 
But that’s me!