Updated 11/14/2019:
Tired of spending lots on postage for individual trades of a few seeds here and there?

NGA has a seed swap next month (trading begins Dec. 5).
If you have extra seeds that aren't too old, and would like to trade them for seeds you don't have, click on "tools", and then on "seed swaps". There's room 48 more members in December's swap.
I believe you have to sign up to see what is being offered, but under "My Profile" you can click on "Leave this swap" and remove yourself easily, if you wish.

The cost is what you spend on mailing your seeds in to the host, and $8 for return postage, for seeds offered by over 30 or 40 people, with the ones who are already signed up.

Be prepared to spend some time listing, (re-)packaging and labeling your seed offers. You don't always get exactly what you are looking for - but sometimes you get far more. I am growing things now that I never heard of before!

ALL HAVE FOUND NEW HOMES, THANKS TO ALL WHO HELPED If anyone needs more seeds for more dibbing I am offering about 30 pkts of 2018 & '19 seeds for $5 postage to get them to you. They are flowers, herbs & veggies. Many are listed on the 'Commercial & Group' forum where I tried to clear them out rather than toss in the trash. They must go! They will be packed randomly & I have enough for 2 pkgs of 30 to 35 pkts.. If contacted ASAP I can mail out tomorrow to arrive before the 1st Seed Swap Nov. 14th.
I've taken part thru a few years but can't this Winter so want to pass them on while viable. Trudy in South Louisiana