I have bought dozens of raw, vintage cards from GM. Generally, I'm happy with his service, but that's probably because I don't intend to get my vintage graded and never have. The reason he is so successful IMO is that he is not scamming like so many on Ebay who sell raw cards that have defects they don't tell you about. On the other hand, he is fairly generous with his grading criteria, like PSA used to be, and he has not changed with the times.
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