You be the judge. Today's binder, そーなんだ！ (so-nan da), puts the Manga into the Magna Carta and other events for only 190￥! First up, are the covers (starting with a Question Mark and ending with an Exclamation Point) and the colourful dividers and because everything is just so cool, I've copied four entire stories. 
The accompanying magazine also has the ? and ! covers and then an introduction narrated by a couple of kids.
It then provides a timeline with the History of 日本・Japan on top and 世界・World Politics on bottom.
From the 中世・Middle Ages, we have the story of 天下統一をめざした戦国の英雄織田信長の登場. Which appears to be a tale of one of the Emperors of the day (I'd translate it for you, but I can't find my glasses and it requires squinting.)
Starting with Adam & Eve and then following a more evolutionary stance in 原始・Prehistoric Times, we go on a quest for fire, kill a mammoth and end up in an agrarian Japan.
Back to the Middle Ages we find a tale of Samurai and Ninjas.
The final story is about how the ピラミッド・Pyramids were built. The slaves look so happy slaving away!
Finally, there is a potential present for subscribers to the magazine (this time at 580￥ a pop!) A nifty little hieroglyphics dictionary that comes in its own sarcophagus!
