Over the years, I've been fortunate to put together a complete run of all the "Ralph" issues, each of which features a cover illustration from the story. Here they are. I think you will be as impressed by them now as I was when I first saw them.
Later, Gernsback went on to coin the term "scientific fiction". The first issue of any magazine devoted to the genre is this 1923 issue of Gernsback's Science and Invention and the first magazine devoted wholly to the genre, Amazing Stories (here the first issue) was founded and published by Gernsback in 1926. It is a fitting tribute to this genious of futurism and publishing pioneer that today's awards for science fiction writing are known as "Hugos".
From a collector's standpoint, individual "Ralph" issues of Modern Electrics bring about a hundred dollars each in good condition if you are fortunate enough to find one. A run will take many years to put together. The first Amazing is less rare and sells for $500 and up depending on condition. The Sci-fi first usually brings about $300.