Harvey
Sometimes it works out, as your case and other times it doesnt. There are times and customers who you just get a gut feeling about.
I had someone purchase a purple violin from me. A month after receiving it, he emails and tells me that he thought it was supposed to be an electric violin. He even suggests that I changed my listings from what I originally had listed and removed the word electric.
This guy went beyond making a mistake, he tried to accuse me of changing his listing which ended a month earlier.
I told him that the cost for him to return it to me would be almost the cost to add a pick up from a local music store and make it an electric and I would not accept the return.
The fact remains that he didnt want the instrument but attempted to lie about it and make me the party who misrepresented the item.
This is similar to what the OP's customer did in his first email. He accussed the OP of lying about the condition of the emblem being severely scratched.
When he realized that the OP may have pics of the emblem without any severe scratches in complete contradiction to his initial description, he changed his tune to describe the marks being more of a blemish, however one that would still leave the item less than perfect, according to him.
The fact remains, that there is a good chance the customer may just not want the emblem as he got another for less money and was prepared to severely mark it up and now is hesitant about how much he should mark the emblem as the OP's pics wouldnt support his claim.
I dont think the OP should risk a return following the more legitimate sounding response received in the 2nd email as it completely contradicts what was in his first email and that smells.
At the very least, wait until the guy sends pictures to see what damage or marks he is referring to.
Malcolm