What’s an old stub of pencil worth?
First Huey Dewey and Louie trade it for ever better items until they get a ticket to India…
…and after Donald becomes the Maharajah of Bumpay and ends up in trouble they trade another pencil stub for better and better items until they can rescue Donald.
I believe that the use of the scans from Carl Barks’ story Maharajah Donald falls under “fair dealing” as described by the UK Copyright service.
This blog post reminds me of kxcd’s In Popular Culture comic.