Every antique shop I have been to up here in Winnipeg tends to just box the razors and store them in the basement, they don't see them as an easily salable big ticket item. I was scouring flea markets to find mine and they still are looked at as junk items and usualy go for a song.
My parents' own an antique store, so I have been lucky to get my razors from there. I have a Fatboy (don't recall the year off hand) and a SuperSpeed. We also have several straight razors. Haven't had the guts/time to use a straight, but I have been using a DE since the time I needed to shave! I started out using gel goo stuff and a Fatboy.
That does look like a decent find, though! Old DE's are awesome!