A very nice (F/VFish?) copy of Tomb of Darkness 20 brought $437 in an ebay auction. Noted ebay seller and Marvel price variant hunter/collector Flyingdonut sold the book.
There are no recorded sales of a CGC certified copy of this issue so the value of these books is anyone's guess. Everyone knows that the price variant horror titles are very tough.
I always felt that issue 21 was tougher than issue 20, but that may be just personal experience. They are both tough books since there were not a lot of people collecting reprint horror titles back in the 70's. The single highest graded 21 which is graded in 9.6 sold in 2012 for $750.
