That’s a clever business idea. Governments will usually demand you register a company in order to be able to legally export them.
Nah. As long as you don't sell many, you can get away with just marking as gift and putting a value of 20 USD on the package.
I'd send close to 500 packages a month to destinations all over the world, and tracked items almost never go missing.
For those that do go missing, it's always to a few hotspots that I would simply avoid if selling an item this valuable (pretty much just Brazil and South Africa now; Russia and Italy are much better than they used to be).
So yes , "nobody cares" as long as you don't get caught.