Jarvis, I think first you are making a big assumption that this is the same guy based on his one post that he would take the sign.
Second, it's not the same sign. It's obvious if you look at the sign. Take more than 10 seconds, compare the two signs side by side.. notice a major difference? C'mon it's easy.
Now as to whether taking one sign and turning it into something else that it never was, if the seller discloses the change then it's between the buyer and that seller. If on the other hand the seller wants to be dishonest then lets string him up by his thumbs!
You know as well as I that most pump restorers don't always restore a pump to the brand it started out. Plenty of lea way is given in that respect. That's not seen as sacrilegious even though it's similar in kind. I know, a pump is a far cry from a sign, but the idea is the same, making it something that specific pump never was in it's life.