An Illinois dentist sold part of his comic book collection at auction last week for $570,000 to help him pay for treatments for a rare autoimmune disease.

Among the more than 400 Silver Age comics were a copy of Fantastic Four #1, which fetched $60,000, and Tales to Astonish #27, featuring the first appearance of Ant-Man, which went for $40,000. Even a CGC-graded 5.0 copy of Amazing Fantasy #15 sold for $13,400.

The Daily Herald reports that Steve Landman, aka "Dr. Fate," who is closing his Lake Zurich dental practice because of his disease, was diagnosed about two years ago with anti-MAG IgM peripheral neuropathy, which attacks the nerves. He'll use the money from the auction, minus fees, to set aside from potentially costly medical treatments and travel expenses.

The 62-year-old Landman has been buying comics since childhood, amassing a collection of more than 15,000. He' originally intended to sell them after he retired, but those plans changed with his diagnosis.

""I imagine that this is a good enough time as any to sell a comic collection," Landman said, "what with all the superhero movies out there."