I have never inquired to buy a gun illegally, so no I do not have a source. Also I have never purchased or inquired to purchase a P80 either. So same same. Like I stated, it cost HPD $800 to make 1 gun (testimony given by Major Nielson). Now assume they would sell it for a profit to criminals, the mark up would definitely be for sale about $1500. Because if someone is making and then selling guns illegally, a $100 mark up isn't worth the risk. Then add in the time you need to spend on each gun and initial start up for tools needed. Which you may already own, but let's assume you don't. Would a criminal spend $1500 on a P80 knowig they will have to toss it in the bushes if being chased by HPD, or spend $400 (higher than $200),
Lets assume a criminal would make a P80 instead of buying one already made, at minimum about $800, plus time and effort/labor. So would they do that or buy one for $400 and can just toss it if being chased.
Again, you are thinking like a law abiding citizen who is trying to maintain a clean record. Think like an illegal arms dealer who doesn't care, but wants to make a quick and easy buck.
He only know how to think like EEF. All of his hypotheticals are from his perspective, and the logic he uses is that of a keyboard commando.
If you read enough fiction books where the authors actually did their research, follow the studies on criminals and guns, and look at some actual documented cases of how guns were obtained, you really don't have to "know people in the black market" (racist?

).
80% of of people who were arrested and convicted of crimes while in possession of a firearm say the obtained them from friends, family members or "associates". Associates can be other members of their gang, members of gangs they happen to know, people who were "recommended" by their friends, etc. Basically, the "black market" is not some stranger selling guns out of his basement or trunk of his car parked in some alley.
Criminals know the ATF and other LE agencies do stings, and if the buyer were to trust a seller on Craig's List or FB, he's taking a huge risk of getting arrested before he's even attempted to use the gun. Instead, they look for anyone in their immediate circle that can get a gun. Failing that, they ask those in their immediate circle if they know where they can get one. The closer to themselves the source is, the more they can trust it's not a sting or someone who will turn them in for attempting to illegally buy a firearm.
Most people don't associate with people who regularly deal in black market guns, so they have to rely on their acquaintances to steer them to someone.
EEF is more of a DIYer. If he can't figure out how to get a "clean" gun and avoid the proper, legal process without help, he's less likely to try finding a "source" he can trust.
At the very least, he's making a false assumption that if he doesn't already know "people in the black market," that finding someone willing and able to sell him a gun is somehow more difficult than making a working firearm you can trust to work when needed.
I think going to a shady seller has more inherent risk than producing a gun yourself if you have no one to vouch for the seller. So, in that narrow case, EEF has a point. But, if you stop there, you have failed to explore all your black market options.
This is a small island when it comes to people knowing each other. I'm sure putting out the word that you're in the market will find you someone, or connect you with someone else, willing to sell an illegal gun.
Druggies, thieves and lifelong criminals aren't exactly the most reliable of customers. If you have the cash, someone somewhere is out there waiting.