Mmmmm.... I've never seen them before, either, but can only imagine how wonderful they are -- the taste of fresh tomatoes definitely beats the tinned ones anyway, but San Marzano are so delightful when in a can that they must be absolutely sublime as the actual unprocessed, freshly grown fruit!
Our fresh strawberries, blueberries and raspberries haven't yet been available, but they should be soon. Normally the month of June is the one when we can get freshly picked, right off the bush berries.
Ah, SS, your whole paragraph about the treats you selected at the market had me all but drooling! Mmmmm..... We have a freestanding permanent farm market (open during most of the year but not in the depths of winter, understandably) not all that far from me. They have nice vegetables and fruits and various jams.
Alas, they don't carry olives as part of their regular offerings. Happily, I can get various kinds of olives at one of our specialty organic food chains at their Olive Bar, which has many more offerings, a versatile selection of the different styles and types than what is available in the local grocery store.
Also every weekend there are farmer's markets at various locations around the county, where thirty or more farmers bring their produce and set up tables to display the fresh vegetables and fruits for everyone to purchase and enjoy. Parking is usually horrendous, though, depending upon the location.
Usually they are open only in the morning and then all the farmers pack up their remaining items and head back to their farms. I am not an early-morning person, so subsequently have missed out on seeing what they've all got to offer.