As far as the trustworthiness of your coin dealer, I can’t say. Even if these are true mint errors, which I am not saying they are or aren’t, I don’t think this coin is going to be worth more than face value in the condition it is in. Die chips are really not uncommon. Laminations, while interesting, won’t raise the value of this coin by much if at all. If it is all PMD then it is worth 1 cent. If you could post pics of the whole coin front and back, people can get a better look and give you more information and opinions. I don’t think this coin would be worth the trouble, but let some of the other members here have a look and they will give their opinions and advice.