But any HiFiMan retailer can offer a private discount if you email them and ask
Not true. Getting away with it is another story. I had offered 10% only to match what another dealer was offering (which was public knowledge on head-fi for at least 6 months), and someone posted here, and I was contacted by HiFiMAN within a few hours. So now, I just offer free Next Day shipping and will test/burn-in the headphone to save a potential headache later.
And if your headphone has a problem, and you need to contact HiFiMAN support, they're going to ask to see your receipt.
Edited by justin w. - 12/3/12 at 8:18pm