I really feel sorry for the buyer, when it comes time to sell or trade and be told it's worth $100. Something needs to be done with eBay allowing this type of activity. The Confederate artillery Kepi is even worse.
I would think that even during the rebellion a cap with a 15th Corps badge would be rare, given that most of those guys wore hats and wearing corps badges wasn't that big a deal in the western armies anyway.
I would think that even during the rebellion a cap with a 15th Corps badge would be rare, given that most of those guys wore hats and wearing corps badges wasn't that big a deal in the western armies anyway.