Yes, this is an interesting topic, Gillette and other co's blame the, "hipsters" for the 20% decline in cartridge sales as seen in the resurgence of DE and STR8 razors.
Fashion will always be a driving force, as with the ducks, which now seem to be a Holy Grail, while other very fine razors go fairly cheap.
I got these off E-Bay, with case, for $60 plus postage:
Attachment 141178
They are 4/8th full hollow, but have turned out to give some of the best shaves I've had!?!
Guess I would echo what's been said, there's lots of bad quality stuff that will sell on brand recognition alone, almost regardless of condition, and some great razors, that aren't in "fashion", that go for a great price and are a great quality product - like these Wilkinson Pall Mall razors, which I'm incredibly happy with!
Cheers!