eBay, with a suggested price hovering around $300 USD, hmmmm.... I say no thanks. At that price, I will stick to original hardware. Clone systems seem too finicky, sometimes not fully compatible. They have admitted that not all games play 100% correctly. That would cause me to be very cautious considering the amount of money they are asking. I would want someone else to purchase one and then tell me if my favourite games are fully playable. And it is interesting that it has support for Super Grafx, PC Engine, and Turbo Grafx 16. But at that price, I personally would expect to be able to play the Turbo CDs also. At the same time, I have a few clone systems and my experience with the systems are, low quality built and I do not expect the same durability as the originals. So a CD function would probably be very problematic. Might be the reason you don't see it on clone systems. Whether the price of admission is worth it, is totally dependant on the individual gamer. Personally I am satisfied with my gaming experience on my flat-screen and my PC Engine, Turbo Grafx consoles. I still have one old tube TV that I have dedicated to retro gaming. But that will not last as it is over 20 years old.
It would also interest me on how the hardware is being emulated, actual chips, android, or glop.