Valuation please with view to sell BSA Mercury magnum 635

[stevegv8]

This is now listed in collectable sales, this is not where to make the purchase.

Here I have a BSA Mercury Magnum 635 in .25 of course, presume mid 80's
Looking to sell but need a fair valuation, expecting I overpaid again originally
Light marks on the stock, a small ding on the left just back from the stock screw (pic 12) & and pair of light scratches in parallel by the right side at the butt pad (pic 10), but no more than to be expected for the age with a clearly little used gun, I've only ever displayed it.
Blue is very good but a little scratch at the front left of the trigger block (pic 11).
I don't want to start a Dutch auction but invite genuine offers for consideration.

Any sale will have to be collection only with paypal in advance or cash on collection.

https://www.flickr.com/photos/937661...77720323234394