At my local EB Games, they seem to be liquidating their stock of D&D/D20 books. I'm not sure if this is nation wide/world wide, but there were some good deals at mine.
I picked up Call of Cthulu for $22.99. They also had Tome and Blood, The Living Greyhawk Gazetteer, and the Book of Challenges for something like $13 each.
I picked up Call of Cthulu for $22.99. They also had Tome and Blood, The Living Greyhawk Gazetteer, and the Book of Challenges for something like $13 each.