Logitech Crayon (Apple Pencil substitute) for iPad (6th Gen), iPad Air (3rd Gen) and iPad Mini (5th Gen) $49.99

Logitech Crayon is on sale for $49.99
It uses Apple Pencil technology. Only difference between this and the Apple Pencil is the lack of pressure sensitivity.
If you don’t draw professionally, this pen is cheaper and has all the main features.
I got one mainly to annotate on documents. So far, it works great.
Amazon Link