a self addressed stamped envelope. pretty much you take two envelopes (and put stamps on both of them), one addressed to me and one addressed to yourself. put the one addressed to youself inside of the one addressed to me. i recieve the one addressed to you and put what you won in it and drop it in the mail. google SASE if i didnt explain it well enough.
it's a really easy way for you to pay shipping. if you have a paypal account i'll take 2.50 for shipping if you really dont want to mail me an envelope.