Probably these:
Beach-Head - Commodore 64 disk version on a "wallet" type case
Gryzor - PC disk
Zelda Game & Watch
The rarest of these must be that Gryzor. Have no idea about the value but it's really hard, if not even impossible, to come by with one. Me finding that was almost a freak accident. There was this electronics seller having a flea market kind of a thing and he had a bunch of odd games and software for sale. I was just looking inside the box of one old PC helicopter game but it didn't have the game inside. I looked a bit more carefully and in between the manuals were the cover papers and the disk for Gryzor. It's a terrible conversion but is definitely quite a curiosity for people interested in Contra.
For more info about that version, see here:
Contra Encyclopedia home page Contra main page PC DOS Select a section: •Release Information •Overview •Stages •Arsenal •Opposition •Cheats & Tips •Full Plot •Soundtrack •Regional…
contrapedia.wordpress.com
They say "it's next to impossible to find a physical copy." And for me too, this was the first time I have ever encountered one myself. I had known about it but it never showed up anywhere until now.
EDIT:
And yes, that's a Samantha Fox poster folded over the Commodore Music Maker.