It may not be the best designed adventure series ever, but Sierra's King's Quest is historically important, wildly imaginative, evocative of the most nostalgic feelings and filled with more than enough amazing moments and clever puzzles. And King's Quest VI remains a truly great point-and-clicker set in a fantastic fantasy setting.
Better though, see for yourselves via this King's Quest collection that appeared on eBay. The highest bidder will be getting the boxed versions of all the games (with the exception of King's Quest VII) that seem to be both complete and in great condition. Also, an extra King's Quest VI copy.
Seller ships the Americas, Europe, Asia and Australia.