Just a sidebar here.
If Hyperkin made a system that retailed for $129 to $159, our markup would be another 5-10%, the majority of profits would go to the retail outlet. The is intended, as retailers have a larger percent of overhead cost than we do. Could I accomplish a lot more with a 5-10% margin, not really.
Nobody gets rich making retro systems, we make more money selling cheap replacement cables and lately batteries. There are several folks who make absolutely great hardware, mostly custom, and I'll namedrop one here for anyone looking for a great Neo Geo MVS home console goto:
http://arcadeworks.net/