Well, as far as cachet goes most w&b have next to zero cachet with me, and a blank that doesn't seem to have been intended to ever become a razor for sale doesn't either.

I have no idea what the future of the straight razor market will be, but I've been around long enough to know that today's hot item may not be so hot few months down the road and then could become hot again.
At some point people were willing to pay over 1k for used filarmonica epbd in excellent condition, right now brand new ones on ebay go unsold for $400.

I personally have a few big sheffields somewhere in the boxes but just for variety and completeness. With the restoration they've probably cost me few hundred dollars a piece, but that only means that those particular ones were worth that much to me.

As far as raw state goes, that same seller had to take $2.25 for a Barber that would likely shave circles around most w&b - just because it was in its nice untouched state
http://www.ebay.com/itm/261813297026
That must hurt, but it shows how silly the market valuations can be.