Robinson Crusoe on Mars is a hoot. Great B-movie sci-fi fun. The spaceships I believe are leftovers from THE WAR OF THE WORLDS that have the top removed. As the title conveys, it is pretty much the Daniel Dafoe novel set on Mars.
THE VALLEY OF GWANGI is one of my favorite Harryhausen movies. Click
here for my spoiler free review. I believe it is "eohippus" Andrew, but don't quote me on that.
I haven't seen TERROR IS A MAN (but I taped it last night--soon to be rectified).