When IBM commissioned King Quest for its ambitious IBM PC Jr. it never expected the adventure game series it helped spawn to outlive its ambitious attempt at a home computer, but, well, these things do happen. And the graphics adventure was indeed born. Oh, and the original version of King's Quest became a highly sought after rarity.
For an expensive chance to actually own said rarity in its even rarer complete form, you can bid on this impressive King's Quest (PC Jr.) eBay auction. The game comes in its plastic box with 5.25" disk, insert, manual, backup diskette certificate and the lovely keyboard overlay. Mind you, this is the very first edition of the game from 1983.
Seller ships worldwide.