What a creative and fantastic idea! I'd totally buy it, even If it was just for the cover, that says alot about your work, although I'm pretty interested in the interview with Rarity, she never ceases to impress.
This is very lovely, and you got the old-timey magazine style down nicely. (Hard to believe anything was 15 cents at one point in time.) Rarity looks great to with the way you drew her hair, and outfit.