I know of a store in MA where you can walk in and buy seeds. I assumed it was all legal, but just in case it’s not, I will refrain from linking to their website. I don’t want to cause problems on my very first post.They get confiscated by customs, not the state of MA. And yes, under the farm bill it isn't federally a crime to ship seeds, BUT...
In MA, no retail store is legally able to sell seeds to rec growers. Even at NECAN, there will be no vendor with thc seeds. Only legal hemp/cbd products can be sold; including seeds.
Edit: Just spoke with them on the phone. You’re right. It’s not a retail shop. It’s located in MA but it’s all done through the mail.