I think they were sold at Costco, and maybe BJ's wholesale club.
Its the type of thing u pick up on CL when you can find them cheap. Like I said, they dont have a huge selection of games.
The neo cabinet had like 5 games I think? There were also 2 Taito cabinets, a large stand up machine and a smaller one. You could switch SD cards to make the Neo cabinet play the Taito games. The taito selection was ok. It had like 3 versions of space invaders (meh) and arkanoid... yeah and playing arkanoid on the machine is just not happening. Once you get good at arkanoid with the dial you just cant play it with the joystick. So they kinda are a mixed bag.