If you find actual farms and coops you can get good deals.
There’s a local food coop that sells large boxes full of produce for $20 every Thursday - but you don’t get to choose what’s in the box.
Some of them do a half-off sale for everything they've got at the last half-hour of the market, that's good to know. Some are just buying from the wholesalers, too, that's something to watch out for as others note - but some of those run lower margins than the local grocery stores, so it's cheaper to buy from them.
Even then, I was shocked at the low prices.
I stumbled on this Farmer's Market by accident.
I had this security job guarding the Cow Palace on the weekends. The insurance was less if they had a guy on the premises.
I remember seeing my boss (Bill. The nicest boss I ever had. Never forget this huge man walking towards me on a Sunday in complete darkness besides the emergency lights crying while holding a dead cat. He loved the abandoned cats that neighbors left on the property. The higher ups authorized poisoning the cats. I could feel his pain. When I saw the bait traps I disposed of the poison. I was the only one there during the day so I got no reprimands. I thought I'm fired, while carting my huge box of fruits/veggies, and honey, but he didn't care.
Since that day of shopping at that Farmer's market I was ruined I guess? Everone I have been to since was overpriced.
(Here's something to think about. There is a tiny model of the Cow Palace buried below the auditorium floor. Only a few people knew about it then. It was left there by the architects. I had keys to most rooms, and did my fair share of exploring. Seeing that model of the Cow Palace was something out of a Twillight Zone episode. They even put in tiny cars in the parking lots. It was all dusty, but an exact model of the Cow Palace in Daly City.)