The Shadow Pulp Covers

 Any of these would have gotten my dime (or dime and a nickel) immediately and I'd be reading it was I walked away from the newsstand. 

Planet Comics Cover Gallery

I think the cover artists were told "Don't come in here with a cover that doesn't have legs prominent or you will be smacked by my secretary! The more legs the better!"

 

Classic Weird Tales Cover Art

Amazing Stories Magazine Cover Gallery

 

Weird Tales Cover Gallery

In the winter months I read a lot of pulp fiction from the 1920's through the 1940's and the creepy stories published in Weird Tales are a favorite.