Baker is likewise in a bubble phase, to the extent that his covers are extremely trendy right now. Prices have gone completely bananas over the last few months. Last year I had a slabbed universal Cinderella Love 27 in lower grade (1.5 or thereabouts, can't remember exactly) and I couldn't give the thing away. I sold it for about $100. A CL27 just sold on ebay with a missing centerfold for over $400. This is frenzy territory, likely propped up by a few buyers with deep pockets. You mentioned Frazetta. His Thunda 1 was one of the hottest books around a couple decades ago. While it has seen a recent bump with the hotness of GGA covers across the market it is still nowhere close to the value it once achieved. I love Baker's work and still own his books so I'm happy to see the prices being realized but there's no way this is sustainable. It's too much too quickly.