our gander and mt.has a used gun tag on the used guns,just take it back with the tag and if it doesn't say used they should have no problem taking it back,if it has any rust in the bore or on the barrel then surely they can tell that it just didn't rust overnight,just be cool and ask for the manager as soon as you start the deal,because they will be needed for a gun return I'm sure.And by the way the used guns at our store have new prices so this would be an easy mistake.good luck!