In the same vein, I'm surprised that Invaders annual (his last comic) isn't a $50 bronze book all day in the common F/VF mid-highish grades, let alone better. But I think patience and box rummaging can still yield NM at $10 or maybe even less. It's far from his best, but it's his last, it's GA heroes in a war scene, and it's clearly signed.
There's a thread in General about the need or lack thereof for LCS's these days, and I think this belies the real point: the Internet lets you search for most anything, but a good, old school store owner is a comics history teacher. I learned so much over the years talking to shop owners, especially Bruce Conklin (retired, Octobercountry, New Paltz, NY) and the late Vic Bertini (Iron Vic's, Poughkeepsie, NY; no longer there).
OP, I think this gets at your original point. If newer collectors don't appreciate the genre's history, one's collecting passion often takes one back just as far as their personal nostalgia.