Suggestion: Hello Mr. Doodle Greetings from a fan. i always wondered why you don't have many followers on the internet, well i think the reason is you don't upload many interactive videos. Suggestion : Upload tutorials like you made 4 years ago "How to doodle a wall" those will definitely work Hope you'll see this.
while that may be true, i think people spend money like crazy now, so his original art is probably worth a good amount to a select market of people who buy this stuff.