Yeah coffee is one of the rare items I'd be a stickler for buying a specific brand name. I do remember seeing a bunch of K-cup inventory as well. Looking at Costco.com, they want around $15 for a two pound bag of Peets whatever. I can go to any of the grocery stores around here and pick up the same thing for the same price (or around $12 when they rotate it through a sale price which Safeway seems to do regularly). Looking at Costco.com the Kirkland stuff is cheaper (no way to filter by whole bean / ground though).
I just though of something else about the dutch ovens. Costo.com also lists a Lodge enameled dutch oven for $58. It's the shape (round) I was looking for and about the right size. I passed because I was looking for a made in not-PRC one. Amazon carries the same Lodge one for only wants $60 though. I ended up with the Williams-Sonoma house brand one (made in France by Staub) for less than Costco wanted for their similarly sized Le Creuset one.
I've heard good things about the print lab, pharmacy, and optometrists but have never used them. The Costco prices on vaccines compare favorably to the normal prices of the city/county run SF clinic, but not by a whole lot. The state of California subsidizes some vaccines for low income folks though. At $26 those are cheaper than what Costco charges (except for the flu vaccine).
https://www.sfcdcp.org/aitc/aitc-regular-prices-low-cost-or-...
https://www.costco.com/Pharmacy/adult-immunization-program.h...
The price/value proposition just wasn't there for me.