I've taken to watching Best Buy ads in my email inbox -- not just for electronics (which I admit is my primary interest!), but over the past few months because items like coffee K-Cups for Keurig brewers periodically appear in these short-lived sales. I haven't figured out the frequency yet, but if I had to guess, I think the K-cups wind up on sale at Best Buy perhaps every 7 to 10 weeks. When they do, I immediately search the online ad listing to see which varieties are included in the offering. Best Buy has become my primary way of purchasing Starbucks Sumatra K-cups, as the discount price is, without a doubt, the best price available (and I HAVE searched!). Add to this that these items are available with no shipping charge and I still get them delivered to my front door in just a few days and I'm hooked!
Glad Best Buy added these to the offering. I just much of my electronics there (most recently, a Rachio 16-zone smart sprinkler controller), and this just adds a cherry (well....some coffee) on top.