I'm surprised there wasn't already a thread for this, but now there is.
Purchased a Neo-Geo MVS 4-slot from @crazyjojo . It arrived nicely packed, undamaged, and at first was not booting. After some troubleshooting it was found to be an issue with a UniBIOS chip. Fortunately, he included the original BIOS in the box! So, now it's working like a champ. Thanks again crazyjojo!
Purchased a Neo-Geo MVS 4-slot from @crazyjojo . It arrived nicely packed, undamaged, and at first was not booting. After some troubleshooting it was found to be an issue with a UniBIOS chip. Fortunately, he included the original BIOS in the box! So, now it's working like a champ. Thanks again crazyjojo!