Benefits of an Attic Clear-out Come my Way: Space Crusade and Battle of Britain

My brother's attic received a pre-Xmas clear out (as in "What are things that are not Xmas decorations doing in this pile?") and I was the lucky beneficiary of two old, old games dating back to the late 1980's/early 1990's (see below):

Space Crusade is missing a few parts (notably a Dreadnought model and lots of counters) but the Battle of Britain is in pretty much mint condition (I remember playing it once). A detailed "unboxing" will come later. However I am torn between keeping Space Crusade as a "Collectors edition" for future episodes of "Antique Roadshow" in 2100. I think it is pretty much as given that I will "devalue it" and paint the 'dodgy' miniatures ;)

The notion of using my small collection GW miniatures as fill-ins and extras also makes common sense to me!