Those are real 80s BobI did a search on what it cost to make a ghost gun, and found this.
"Everytown’s research found that it is possible to buy an AR-15 ghost gun build kit and a lower receiver for as little as $345. Kits for making Glock-type pistol kits with a frame can go for as little as $400. These prices compare favorably to the cost of buying an assembled firearm at retail."
USA-Gun-Shop said, "You can build an untraceable, well, something approaching a Glock, for about $350 if you go the absolute budget route."
Those are real 80s Bob
Unless I'm missing something, what @Klaus has posted are 3d printed "ghost guns" that I'm guessing we're made as cheaply as possible to look like functional firearms but would actually just disintegrate if a live round was ever discharged in it. They were made as cheaply as possible as a way to scam the "no questions asked" gun trade in (I will never call it a buy back because the govt never owned it in the first place) program.
*edit*
I also know nothing of real 80% firearms because I do not own, have never owned, nor have ever thought of purchasing 80% lower receivers or 80% pistol frames.
and electricity on the home units is about the same as a 65watt bulb, it's an impressive margin regardless.$8990 profit assuming 4 / spool and $20/spool