Zine Trade Tips

following my last post, on SamProof's video tutorial, he talks about zine trading and he has had a great idea i feel i must share you (even) more people!

according to his own words, if you would like to have a copy of the zine but are short or out of money, you can send a drawing with a self-addressed stamped envelope and you will receive a copy of the zine back! also, your drawing might appear on the next issue of the zine!

i think this is a very good idea! usually, zine trading means you send your own zine to get a copy of someone else's zine. but what if you are not a zine-maker? that would leave you with no zine to trade and you would never be able to get that zine from that person... so, SamProof's proposal is a very generous one, in my humble opinion.


my only question/doubt on this hole process is:
how do self-addresses stamped envelopes work when sending them outside your own country?
i mean, i know how much it costs to send a letter to another person in my own country (Portugal), but how can i know how much it costs to send a letter from the USA, for example, to Portugal?
and in terms of currency exchange (Euro stamps postage vs. American dollars stamp postage), how does is work?
perhaps this is a bit of a dumb question, but, hey, if you can enlighten me, i'd be very thankful :-D