Retrogaming with Racketboy has up a feature looking at some of the 'holy grails' of console collecting. These are titles worthy of long, hard searches through auctions and used game stores ... both for their quality and their rarity. From the article: "16. Star Fox: Super Weekend/Donkey Kong Country Competition Cartridge, Estimated Price (Loose): $200. If there was a big one-two punch in Nintendo's fight against Sega's Genesis, Star Fox and Donkey Kong Country would be it. While the main retail games may not be rare at all, there was a special package that is quite desirable. The Star Fox: Super Weekend and Donkey Kong Country Competition cartridges were used by Blockbuster Video in tournaments held within the store, and never received a true commercial release. The winners of the tournaments would receive prizes such as jackets and sometimes even vacations."