Wow.. I'm honestly.. kinda flabbergasted.
I've been using PC forums for nigh-on 25 years now, and I have --never-- heard anyone advocate secrecy of sources in order to protect capital advantage. Why would you reward merely the investment in trialling products, rather than the makers of the quality product itself? Seriously now, isn't the --whole point-- of a like-minded community to share ideas, tips, useful products, good sources, etc so that everyone benefits and no-one is hog-tied to making the same experimental trial-&-errors that others were? Reward the good product, certainly; never reward the guy holding the information to ransom.
I now have 5 "spare" picos here, not counting the Minibox one in my build. Once I have a couple of extra AC Adapters, I'll happily run a few tests over them and give my feedback, so that everyone here can benefit and decide for themselves whether some of the cheaper options do indeed happen to fit their needs. Because exactly as you say, it's up to us as consumers to decide what is "fair" pricing. But if you insist on suppressing market information so that the established players can continue to profit from mere "good sources" info, well.. I really feel that that's counter to the whole spirit of 'community discussions'.