Lots of great info here. I can add that I have purchased a game (non-pin) from them and would recommend them to anyone. Todd responded quickly to questions and was easy to deal with. Their place is pretty cool too, like going back in time. I bought a project game from him and we worked out a price assuming it was non-working. He tested it before I got there and it worked fine but kept his word on the price.
I'm not sure I would buy a pin from them. Not because I don't have confidence in their descriptions or trust them. I just know I can find better prices from collectors. It has nothing to do with them....just my wallet and I like to do my own restorations.
For what it's worth I bought a project pin from GRC once....wouldn't do it again.