Vegetable stands that still have stock after work

Cheap vegetables are tempting, but catching the stall before it sells out seems like the harder part. The corn sign here is still up above an empty shelf, with other vegetables left below. I’d rather know when fresh bags usually appear than make a special trip for a price on a sign. Are there unmanned vegetable stands near you that restock in the afternoon? An area and a time you’ve actually found things still available would be useful for anyone shopping after work.