Advise and recommendations?

 

Being in the mid $400 area new I would guess it is an alright price for a used one in good werqing order. Saw a used one for $345 somewhere so it is a decent enough deal.

https://www.pyramydair.com/product/diana-model-48-sidelever-action-spring-piston-air-rifle?m=403

Edit; 

Guess I should have said a bit more since I am a fan of the Diana airguns. I sold my 52, just a 48 with a fancier stock, for about that price because I got a 54 which I love. These are great accurate and powerful guns for the money even when paying full price cuz they are new.