There are stands like this all over Moscow from May until the end of September. It's unfortunate that we miss a good chunk of that time! They're so CONVENIENT!
Another plus: these days you don't have to bring your portable radiation counter with you! The produce isn't coming from anywhere near Chernobyl; it's mostly from places like Adzherbaijan, Georgia, etc.
In any case, now I'm here and I can pick up some produce as I walk Katya home from school. If only I had more time to actually cook these days...!
When we first moved here, these stands provided my kids' first introductions to fruits they had never seen before: varieties of currants and berries that were so juicy! Some were sweet, some were VERY tart, but they all made it into my pâte brisée crusts...