Oh god....I'll have to think.......I've heard of one.....brb
There is a guy who solicits second hand strings for distribution into the third world. It's called the Second Strings Project. Here's some contacts:
Tangible Music 516 409-5433
strings@tangible-music.com
Kevin Deame
28 Ladd Road,
Ellington, CT 06029
And some info on the web:
http://store.yahoo.com/tangible-music/secstrinproj.html
http://www.darrylpurpose.com/etc/strings.htm
The way I understand it, he wants playable strings, not old worn out rusty ones. So the ones I send are the "I have a gig and my week old broken in but not sounding as good as I want strings." I heard that Taylor guitar sends the strings that are on instruments in for repair that they put new ones on, etc.
The web stuff is a couple of years old, so I hope the program is still going. The big box I sent them at least didn't come back to me...
http://www.guitarseminars.com/ubb/Forum1/HTML/000968.html