I wonder what his buyers get in return. No one is buying those for the artistic value.
There's no telling, but they do get something in return. My art is as good or better than his, and the most I ever got for one of mine is $150 - but my name isn't Biden, and I don't have access to the president. See that large painting on the left side of the pic? That's just some alcohol inks dropped onto a canvas then either hit with a blow dryer or he blows through a straw to disperse it. Knowing him like we do, he's probably blowing through a straw.
I can do that in 30 minutes and $30 worth of supplies - and I'm not kidding.