The Smart Keyboard Folio is great! I got one on clearance a few months ago and use it whenever I'm using the iPad around house/town. (If I'm travelling out of town with my iPad where I won't be able to use my desktop keyboard, I bring my Magic Keyboard instead.)

It's so good that if Apple changes the form-factor of the iPad Air, I'll probably take that opportunity to buy the last Smart Keyboard Folio-compatible iPad Air to stretch my use of it as long as possible. (Though I worry that at that point I'll wear out the internal ribbon connectors eventually.)

Somehow Woot still has a supply of the Smart Keyboard Folio for certain 11" iPads Pro/Air.

My wife is still using an older gen 11" iPad Pro and her keyboard folio stopped working (they fall apart after a few years ), so I took a gamble and ordered one. It arrived in the original, sealed packaging. As far as I can tell, it had never been opened, and it is perfect condition and works great. My wife is very happy. I bought a second one for when this one falls apart.

https://www.amazon.com/Apple-Smart-Keyboard-11-inch-iPad-Pro...