I have started a fruit and veggie exchange in our neighborhood. I was walking the dog and also when we drive, I see all sorts of fruit trees, so I went on Nextdoor (kind of like a facebook for neighborhoods) and did a shout out.
Now I am trading, mint (with is a monster, tries to take over my whole garden), basil, tomatoes, for squash, lemons, garlic and apples.
We are adding more people for more variety. You should try it in your neighborhood.
Great way to meet new people too!