2018 MARKET UPDATE: DARKSEID IS HOTTER THIS YEAR
There have been lots of strong sales recently, with strong returns seen at upper grades. Darkseid fever won't go away.
2017 MARKET UPDATE:
Why is this hot? In a word, Darkseid. Soon to be in the DC Cinematic Universe.
Really, this book is not as hot as last year... but it's nowhere near as cold as some of the books above it on the list. A couple of recent sales have changed the complexion from doom and gloom to more healthy.
Scarce in high grade due to its white cover.
An argument can be made for his first appearance being Jimmy Olsen #134. However, the first full story of Darkseid appears in Forever People #1, and Jimmy Olsen #134 is struggling at the moment. Prices on that book have fallen rapidly in most grades.
FP1 has an all-cream/white cover which makes it hard to find non-CGC copies in very high grade.