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https://github.com/PCrnjak/PAROL6-Desktop-robot-arm https://www.youtube.com/watch?v=PiBCbHtvbpE https://piped.video/watch?v=PiBCbHtvbpE
I'm not sure what the "fill out form if you are interested in building" link is all about on github, but at a glace, this looks like a solid project to build IMO.
No one is making money off of small run hardware like this. The time invested in such a project will never be recuperated. This is a passion and/or university graduate project. The boards available are likely just extras from a small run they did with a prototyping service and were close to a minimum order quantity. If you order the same type of thing from somewhere like PCBway, you'll be stuck with extras too.
I'm too busy learning AI for a project like this ATM, but I would like to build this at some point in the future.