This can be more expensive than a feed store, but it's cheaper than seed packets:
I often go to the bulk bin section of a hippy grocery store, or buy bags of dry seeds from ethnic stores (Indian & Mediterranean suit my climate particularly well). The Mexican section of a normal CA grocery store occasionally has interesting finds, too, like safflower seeds & whole cilantro seeds, $0.70 or so for a 1 to 2 oz. bag of seeds. Labor migrations are such that I think Oregon would have similar products on offer.
I've had success with bulk-bin fava beans and bagged fenugreek seeds. I'm trying black sesame, buckwheat, cilantro, and maybe safflower, amaranth, and/or black eyed peas this spring, and I expect
flax, breadseed poppy, quinoa, and popcorn are all viable from food suppliers.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.