Yes, it's very simple.....everyone in the community sees what happens when much desired parts become scarce. So on one hand a "store" or website is out of stock., then the natural progression in the quest leads one to gun broker where, as always, items that are scarce from suppliers can be found on GB for inflated, sometimes grossly inflated prices.
Hypothetically, someone can create their own little niche in the scarcity market by maintaining an "out of stock" profile on their website or store, but selling at an inflated price under a not immediately recognizable user name on GB.
Most people probably shrug and say "well, that's business". As for me, I think the same way that you do about it.
Thanks for the heads up.