It's kind of a hassle the first time, but keep your paperwork and it will be simple the second time. I do mine thru KB bank, you just go to one of the desks and ask for a "remittance". At this bank you have to bring cash, but there is of course an ATM right there. It costs about $30 to send including bank fees on both ends. I think there may be a cheaper way to do it, but I'm not sure.