My parents have two giant black walnut trees in their front yard in Norval, a sleepy town outside of Toronto. I used to have to pick up hundreds or thousands of these staining green balls of yuck. First couple years you go through the trouble of eating a few, but they're harder to extract than normal walnuts plus I was a kid and didn't appreciate it like I would at thirty-two.
One day I was out in yard after these bugger balls had started to fall and a Jamaican accented guy in his 50s drives up our one way street. He stops the car and asks if we're doing anything with the nuts. I say "we might eat 5 a year, if you want 'em you can have 'em, but try to get them before my mum yells at me" and that was it.
Twice a fall he drives up loads up his little car with walnuts and brings them back to his Jamaican themed natural foods store where he and his wife clean them and sell them.
What I love about this story is just how anti-internet it is. There was no web crawler looking for excess nuts, no search engines, no cold emails or fake users 'til you make it, just a dude driving around and a kid in a yard.
And a natural foods store that really lives up to its name.