The plastic credit-card holder that fits in my wallet has worn out. I used to be able to get that at Longs Drugs (now CVS/pharmacy) or Wallgreen's. Neither carriers it anymore. Someone at the CVS actually remembers that they stopped carrying it. Checking office supply stores turned up nothing except a whole lot of people getting ready for the start of the school year. I even did something I said I'd never do again, and that is set foot in an OfficeMax. (They screwed my company over quite badly in a bit of IMO unethical business practice. Not canceling a contract — they had that right — but stopping payment on a check to us in order to weasel a few extra days of work out of our people.) No luck. I found a place online selling them, so I ordered three of them to make the shipping charges more or less worthwhile.
I keep track of my auto mileage, maintenance, and repairs, in an At-a-Glance organizer. Again, I can't find them in any of the stores nearby, so I've had to order them. Again, I ordered several to try and make the shipping charges less painful, since the shipping is the same for three as for one.
Splenda sweetener is sold in various forms, including a convenient little dispenser that contains the equivalent of 25 packages in little pills, each of with is a half-packet. This is particularly useful on airline flights, since most airlines on which I've flown don't carry Splenda and a full packet is too much for the tiny cups of coffee you normally get. None of the grocery stores, either in the Bay Area nor in Oregon, where I've regularly bought the dispenser pack has them anymore. It's as if they all stopped carrying it at the same time. I can still get them directly from Splenda's "company store," so I bought a case of 12 packets. I'm concerned that the vendor is going to discontinue that packaging altogether, but a case should last for a good long time. Good thing Splenda has an indefinite shelf life if stored in a cool, dry environment.
In all of these cases, I've had to buy more than I really want or need simply because of the overhead cost of shipping, and I will need to find a place to store the extras, and furthermore hope I don't lose the extras, particularly in the case of the things that I only need to access every 2-3 years or so.