Costco coffee availability is definitely regional. We buy the standard Costco "House Blend" whole bean coffees in the 2-1/2 pound bags for our morning coffee. We brew a 2/3 and 1/3 blend of regular and decaf in a basic Cuisinart coffee maker, not a Technivorm Moccamaster.
Costco House Blend Decaf coffee disappeared from Costco shelves around Southern California years ago. At first it came back every year during the holiday season only, but now it is gone from shelves around here, period. It is available on the shelves in other parts of the country, but not here. Costco has pre-ground decaf coffee on the shelves in metal cans, but it is not very good. Because we like Costco House Blend Decaf in bags and it is a good value, every once in a while we put together a delivery order that includes decaf coffee, with enough additional items to qualify for free delivery. (Hint: Avoid olive oil with your coffee order. DAMHIK.)
We have an espresso machine with a built-in grinder. Espesso is an occasional treat for us, so we buy special roasts from Portola Coffee Lab for it. The grinder is messy, so I catch the overflow with a bowl, then add it to our regular morning coffee canister rather than put it in the trash.
For the longer term storage, we keep coffee beans in the freezer. Freezing coffee beans is not recommended by experts, but we have not found a better answer.