I'm not sure whats rare or not anymore. I do have a Spectrum copy of Wrestlemania in near enough mint condition complete with the 3 pin badges it came with. I would imagine to wrestling memoriblia collectors it maybe worth a little bit.
I used to think Zelda Collectors Edition was rare but it's easy to obtain via Ebay although it's maintained a good value, also I have the 4 swords boxed complete too but again it's hardly super rare.
If by rare you mean extremely hard to get hold of now then there isn't a huge number of titles that covers and it pretty much limits you to really old games.







