Captain Marvel Adventures #119 (1951)

Billy Batson finds a businessman picking up a handful of dirt, saying it's worth amazing real estate and that a square foot of the Station WHIZ building is worth at least $1,000. Billy gets caught up thinking about this until he runs into Mr. Morris as the businessman, Prof. Jonas Jonkman, returns to his Curio Shop, intent on soon owning all of Station WHIZ! Later, Billy finds during a broadcast that his script is turning invisible, then his microphone and the piano in the studio too! He quickly calls SHAZAM to summon Captain Marvel to stop the crew from smashing into the piano with a camera (as the camera turns invisible too.) Jonkman starts to use a big machine to make everything invisible in Station WHIZ so he can then hopefully buy it for a song. A local hotel and a local bookstore realize that these services don't work well when the walls and books turn invisible and Captain Marvel finds himself being plagued by people driving cars that are now turning invisible. A man tries to buy a suit (but it's now invisible,) only to find the reason problem is that whole people are turning invisible now. From the air, Captain Marvel finds that the whole block Station WHIZ is on is turning invisible and spots Jonkman, figuring out he's likely responsible, but Jonkman legs it into the transparent block and turns invisible himself. To track him down, Captain Marvel calls SHAZAM to return Billy, who enters and is now transparent too, able to see Jonkman as he races to turn his machine higher and higher to full power. However, he knocks over a lot of junk in Jonkman's shop and Jonkman bludgeons him with a small vase. Billy wakes up bound and gagged as Jonkman threatens he'll make everything invisible forever when he turns it up and then he'll be able to buy up the blank square where Station WHIZ is. But, in doing so, he finds that he can't see anything there himself and therefore can't kill Billy. Billy manages to slip his gag on a corner of furniture and calls SHAZAM to summon Captain Marvel, who quickly breaks the Invisibility Machine and punches over Jonkman, arresting him for this dangerous nonsense. Later, Billy signs off saying he'll be seeing you!