always ask for an sasbe or sase with proper postage leave up to them to determine the amount, but do not honor any request unless postage in with it
before you send the seeds out check the envy for your return address, if your return addy is on it take a black marker and cover it so if there is not enough postage it will fall on the requestee and not you
this has always worked for me and have had no serious issue, the people on here are quite considerate
set the ground rules right awy in your thread where your offering the seeds so you dont get swamped with questions on criteria
thanks your friend Joe