But this is ignoring those potential buyers that chose not to even bid/email/call about a device that was lacking the desired specs.
Not really. I have bought a number of higher-spec'ed Apple computers/devices for base-model prices and then resold them, and I had to resell them for base-model prices because nobody was willing to go higher. Admittedly these were local sales via Craigslist so many you'd have better luck with a national/international audience via Ebay. Not sure. I appreciate the convenience of Craigslist.