On an exchange list, what is one trade?
Just get into seed collection & exchanges. Could someone please tell me how an exchange usually works? For example I see alot of people asking if the trader will accept a SASE instead since there is no matches on their lists. Is this an acceptable practice or is it considered 'taboo' or 'pushy' in any way? Also, if someone says they have 'one trade' worth, what exactly does that mean? Is there a 'set' number of seeds usually in a trade?
Thanks in advance,