Say your name backwards and you could join Mr. Mxyzptlk in the 5th Dimension. While you're still here, you can bring the troublesome imp to your dimension, with this 3/56 DC Superman #104 issue. Published at the tail end of the Gold Age, this vintage comic features an appearance by Mr. Mxyzptlk, and also a full page ad for Showcase #1, a famous tryout anthology title, that gave birth to the Silver Age with issue #4 starring the Barry Allen/Flash character. Leading certification service CGC has recently graded this long-secluded comic (5.5, Off-White to White Pages). Contributing artists are Al Plastino, Wayne Boring and Stan Kaye.

Opening Bid $100.