http://forums.gardenweb.com/discussions/3498771/how-many-seeds-for-trade?n=30

If you scroll about halfway through the comments Leila gives a pretty detailed explanation about sending seeds and how much it should cost.

Rodney

Thanks Rodney - I see it. :-)

See my post tonight on PO frustrations.

the short answer is it depends on how heavy, but mostly on how thick and if it goes at a letter or a package.