Diana G85 Model16 Bearcat .177 valuation please. Its black furniture with grey cast metal action, missing its rear sight unless it gets found. Comes in cardboard carton. Condition is a solid 9/10, but not better. Pretty basic "toy" rifles.
I really don't know much about these. Valuation for a friend, so not a big deal, just want to know a bit more about them to pass on.

Many thanks in advance.