Flash #137 VF (8.0)
1st Silver Age appearance of Vandal Savage! Flash of Earth 1 vs. Flash of Earth 2 cover and story
Flash #137 CGC 9.0
1st Silver Age appearance of Vandal Savage! Flash vs. Flash cover and story, JSA appears in story
Flash #138 VF (8.0)
Flash and the Elongated Man vs the Pied Piper cover and story
Flash #138 VF+ (8.5)
Flash and the Elongated Man vs the Pied Piper cover and story
Flash #140 F/VF (7.0)
1st appearance of Heat Wave, The Flash vs Captain Cold and Heat Wave!
Flash #144 F+ (6.5)
Flash vs the Top cover and story, looks way better, but has a color break in the bomb on front cover
Flash #155 F- (5.5)
Flash vs the Gauntlet of Super-Villains cover and story