Before the Internet came, Nintendo released Super Mario Bros for NES. But Amiga and C64 didn’t have such icon, so Giana Sisters was made. This is a very nice platformer, but the first levels of the game reminds of Super Mario Bros a lot, so Nintendo sued the Giana Sisters and the game was only for sale in a week before it was banned.
Now this rariety is on Ebay. A Amiga copy of the game with casing, floppy and manual. The seller wants €1199 for it, but I hope that he gets a lot more. This is a gem and today Playstation 3 have seen Giana Sisters Remastered be released for it.