I’ll start by plugging Harvard’s free courses catalog as well as Udemy
Edit: Gonna add 2 more I remembered-
Blender - I wish I had more time to learn it, but I did start the infamous “Donut Tutorial” once!
Watch Cartoons Online - Lots of good older stuff!
People moving and can’t be bothered / don’t have the time for FB marketplace or similar
Americans: we so poor, every country is ripping us off!