We have one such local produce shop in our village in western Switzerland. Nobody around, there is scale, you can pay digitally by Twint (or leave cash). Tons of farms around have ie chicken eggs or wine grapes or other products with (weather-proof) tin box (or QR code sticker for Twint) and scale for weighting, nobody around and you just go and take what you want.

Then I go home to eastern Europe (we call it central Europe back home, lol nobody wants to be branded as east European since it reeks of russian association which for a long time means something very negative) and kleptocracy is visible literally everywhere on all levels of society, its nauseating beyond any tolerance from me... Its impossible for me to accept it once I've experienced much better society. One of the reasons to never move back and not raise kids back there, even if whole family is far (which is not always a bad thing).