I think anyone who has one (that isn't a review unit) bought it from Amazon Japan, which has all three regional versions (PC Engine Mini (JP), Core Grafx Mini (Europe), and TurboGrafx 16 Mini (US)) ...

Wow, having paid no attention to the TG-16M, I was shocked when I flipped through the gallery on the front page and recognised Ginga Fukei Densetsu Sapphire in the third shot. Even without blowing it ...