SanDisk Ultra 16GB microSDHC UHS-I Class 10: $5.58 Amazon add-on item

There have been several deals lately for hi-capacity hi-end (U3) microSD cards. Here is a deal on a basic model:
Amazon has 16GB SanDisk Ultra Micro SDHC UHS-I Card with Adapter (SDSQUAR-016G-GN6MA) on sale for $5.58 +tax as add-on item.
This is the lowest price recorded by camel (was previously $8.50).
This is a U1 card, but still Class 10 speed rating.
Yes, you can find cheaper ones on ebay or no-name brands on Amazon, but this is a legit SanDisk card that comes with their 10-year warranty .
Good for devices that don’t need all the space or speed. I bought a couple to put into my parents older smartphones as extra storage (for photos, apps, etc.)