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."