I'm so frustrated with this Ebay nonsense. I just tried to look at comics there and find it impossible to browse in any meaningful way, they are force-feeding direct searches which is so backwards and anti-business sense my mind is boggled.
and here is a direct paste of the idiocy they posted in the Golden Age section, written by someone who knows zero about comics:
How can you tell if a comic is Golden Age?
Here are a few ways that you can check to make sure that the book you are looking at purchasing is legitimate and authentic.
Inside cover: Usually the inside cover