What's your favorite source for heirloom seeds?

[Red Horse]

I love growing Heirloom varieties of vegetables and learning about their origin and history, and I'm hoping to help build up the seed bank at my local library. What's your favorite source of obscure old seed varieties and which seeds do you love to save year after year?

My favorite is A Bean Collector's Window! I only recently got interested in growing different types of beans and I'm pretty sure this guy has every kind known to Man. He even has a bean network of less frequently purchased varieties that you can grow for free and send some back to help keep them from going extinct.

https://www.abeancollectorswindow.com/

 

[CCsGarden]

I save as many seeds as I can.

When it comes to buying seeds, I normally get them from:
Grow Organics seeds
Sow Right Seeds
Organo Republic

 

[A.T. Hagan]

My two favorites are Southern Exposure Seed Exchange and R.H. Shumway with occasional orders to Sand Hill Preservation Center. I'm in Florida so I look for varieties that are known to do well in our climate.