9 out of 10 times, if there is any type of BS story with the item, it's too good to be true. If you have a good, original item, you do not need to add a story to your listing to boost a sale. In these cases, fool buyers. Size, condition, and the word original will sell a sign.
I have had guys try to sell me stuff, tell me this sign was found in an old shed, blah, blah, blah. Do you think if these guys that keep finding these reproduction signs in old sheds would list a real sign as a reproduction if they found it in a brand new building. I bet they wouldn't tell that story.