|We didn't receive the headphones as a gift for our excellent achievements and efforts, as the analogy attempts to falsely link;
the analogy is saying that he can sell it at a higher price and still sell out. He's doing a favor to those who will especially value his product. If $25 didn't go to head-fi, they still would have sold out. If he had not personally autographed every one, they still would have sold out.
The issue is are we trying to take advantage of things done out of good will, when they were not intended as such. Or are we avoiding recognizing these as favors by nitpicking phrases, and philosophizing about profit and capitalist markets.
You think he would go on writing a message and signing each one just "probably for helping his business grow and expand, even if via proxy word-of-mouth." Advertising is not directed at those among whom there's already solid reputation and brand familiarity. From the POV of advertising or profit, or "capitalism" this does not make sense.
Neither is the issue selling above MSRP. The issue is the wording of the ad.