My latest is up at http://www.tcj.com/reviews/fogels-underground-price-grading-guide/
In the early 1970s, not having read a comic book in 20 years, my interest was re-drawn to them by the question of what gave value to art. I had considered comic books worth a dime, since this is what I had paid for them. But this was no longer the case. Value, it turned out, was affected by such factors as the amount of stain from staple rust and whether a woman was being stabbed in the eye on the front cover by a hypodermic needle.