Of course not. But this is true of just about everything, not just paintings. You're paying for rarity not quality.
This. Lots of stupid things are overvalued, there's no reason to single out paintings.
--
From his looks Magus is Macho Man Randy Savage as an anime zombie. The black wind howls, and one of you will snap into a Slim Jim ooh yeeeah! -sonicblastpunch