Welcome to the forum.
If you are after a valuation, put up some good pictures showing the condition. There are plenty of collectors that are always happy to add to their collection.
You say they have been sat on cupboard 40 yrs, well in that case i am guessing you have moved onto other things.
If you are not sentimential about them, move them on and get a few quid, somebodys going to shoot them again. Or get to a club and reunite yourself with them again, re spark the fond memories you had from using them yrs ago. Get to meet some new people.
Good luck