I've seen so many eBay auctions for beads that only post to the US. It's a shame as there are people who would buy from various places such as the UK where shipping is as simple as getting a standard-rate envelope from the USPS. It's a flat rate for these envelopes, they're sturdy, easy to use, no worries about calculating for beads as the weight isn't a factor. Customs declarations can be downloaded and printed so that all you have to do is buy the envelope and voila! Someone somewhere else in the world is a happy camper.
Anyone who only ships to the US is really missing out and so are the people who would buy from them.
-Su