What's it worth?

[Ringe 1]

I've had this gun far longer than I care to remember and still have the original receipt/certificate from the factory. It's in the loft at the minute in a sling but I reckon it's probably a 1987-89 model and is in good condition. Having started to get interested in airgunning again, I am interested to know what people might think of them as a hunting rifle and what it might be worth if I looked to sell it.

 

Thanks,