I spoke today with Rose at PennMac about the Stanislaus Alta Cucina tomatoes. Rose told me that they sell the Alta Cucinas by the can (#10 can), at $4.50 a can, and by the case (6 cans), at $19.95. Shipping, of course, is extra, but Rose made a point to mention that if one buys more than, say, a single item, the shipping charges get spread over a larger base and are more tolerable. She also mentioned that the PennMac website will soon be updated to add other Stanislaus products. It appears that all the Stanislaus tomatoes will have pretty much the same per/can and per/case prices as quoted above.
Peter