Yeah, I agree.
From my (albeit limited) experience though, Mercedes S goes for ~200-250 an hour. The question of whether the Bugatti is worth triple, I dunno. Its also not a great analogy, because cars have quantifiable qualities. Art does too, but its harder to deduce, . Especially for me, who is far from an expert.
Also, I think it has diminishing returns (a moped vs a Mercedes is a huge difference like a scratcher vs an incredible artist, but comparing an incredible artist to a masterful one is probably different than comparing a mercedes to a bughatti)
With that said, I've never seen ANY better work in this style than he does, so I think I could probably be wrong about the diminishing returns.. So, it seems now that I need to do more research rather than questioning price, eh? 😉