The microSD Headache

I want to buy some microSD cards.  So naturally, I go to a store where I can accomplish such a task.  This used to be easy: simply walk up to the display, pick the one with the necessary speed/capacity, and go pay for it.  Done.

Now, it seems more complex, almost unnecessarily so, for a variety of reasons.  Some reasons are understandable, and some defy any sense of logic.

1. My old standby, Staples, now only stocks the more-expensive-per-gigabyte PNY cards.
2. I can still find Sandisk cards at Wal-Mart, but it's an adventure.
3. For inventory control reasons, you can't actually remove one from the display yourself.  So, find an employee once you've made your decision.  It's whatever.
4. They stock both PNY and Sandisk cards, so it's easy-ish to compare price per gigabyte.  It would be easier if the listed unit price was actually "per gigabyte" instead of "per each".
5. A closer inspection of their digital storage section reveals that almost nothing is stocked where it should be, this makes price comparisons difficult since you have to do separate searches for the speed/capacity combination you need, and the price thereof.
6. One of the devices I want a microSD card for is my Nintendo Switch.  Why not just grab one from the section of Switch accessories?  Well, those cards have a Nintendo logo on them.  That Nintendo logo adds $20 to the price tag.  I don't feel like getting ripped off.
7. So whatever, I've looked around and solved the puzzle of finding a suitable card and its price.  Ready to buy, I look around for an employee to handle the inventory control, but they've all conveniently disappeared.  The only ones I ever see are busy moving large amounts of stock to shelves elsewhere in the store, and thus don't have the tool/key/whatever they'd need to unlock the inventory control thing and sell me a microSD card.

Why not just buy one online and avoid all the hassle completely?  I'm leaning more heavily towards doing that, to be honest.  The trouble with buying them online that has always sent me to brick-and-mortar stores in the past is the prevalence of Chinese-made knockoff cards made to look like they're from a trusted brand, but with significantly less quality, ultimately ending in catastrophic data loss.  If there's a place online where I can buy known legitimate Sandisk microSD cards, I'd love to know about it.

The worst part of this problem is that it's one of knowledge.  Your average person who doesn't know a heck of a lot and just wants a microSD card can navigate the maze of confusion with relative ease by finding an employee first and being guided through the nightmare unscathed, possibly receiving bad advice from a misinformed employee in the process.  The problem only arises as soon as you know what you're looking for and just want to get in, get out, and get on with your life.