KuGi Keyboard case only $32.95:
http://amzn.to/2f1tPBP
Colored Cases from KuGi only $37.95;
http://amzn.to/2wTet9r
If you are wanting a budget keyboard case for your 10.5" iPad Pro, then the case from KuGi might be the case you are looking for. It is Bluetooth, so it doesn't connect to the iPad as easily as the Samrt Keyboard; but, it only takes a few seconds to connect the keyboard to the iPad Pro by turning on Bluetooth.
The Pros:
Price
Protects the front and back of the iPad
Has a case for the Apple Pencil
Works great
Battery life is decent
Cons:
Doesn't use the Smart Connector on the iPad
Getting the iPad out of the case is a pain
Yes, I recommend the keyboard case. It is worth the money in my opinion. It isn't as nice as the Smart Keyboard Case from Apple, but it is a 1/5 of the price.