Thank you all for the help. I've contacted the seller and they were very nice about it, I think they didn't realise it, like some of you said. They said they're sorry and didn't know and I should get back to them about what I want with the situation. I asked for a refund plus my shipping fee so I can ship it back to them. I thought about it and I would have never bought the pin if I knew about the scratches so it's only fair for both of us that the pin returns. And someone on the forum is selling the same pin, so I can hopefully buy that one!
Still a bit sad, getting a grail in the mail is supposed to be fun lol. Now I'll just wait on their reply.
Edit: They replied and said they would refund when they receive the pin. I'm quite paranoid about these things because it's so easy for them to not refund when they receive it. But I have no other option I guess, so I'll ship it tomorrow. There goes my grail.