Welcome!
My registration finally got approved, so today is my first day for posting here, although I've been lurking for a few months.
But yeah, I have to agree with you that finding TurboGrafx stuff in the wild is getting harder and harder. I went to The Video Game Summit in the Chicago-area yesterday, and only two sellers at the convention had any TurboGrafx stuff. One only had a system with 2 common games which he was selling as a lot, and the other one had about 40 HuCard games and about 5 CD games, and several guys (myself included) were all over those games.
Side note: The games that he brought were just his doubles - he has a complete U.S. HuCard set minus Magical Chase, and the convention was 'showing' the TurboGrafx, and their 'show' guy had a complete HuCard set minus Tonma and 9 others, but he had a U.S.-released Magical Chase which he was letting people play with!