Is that a steadfast rule?
butts each make their own choices . its beween your backside and whatever saddles you find you like ..
Brooks saddles were cheaper in 1950, but so was a lot of other stuff..
visit a Bike shop and sit on a variety of saddles they have .. the LBS here has Take-Offs ,
new but they came with new bikes ,& the bike buyer wanted something else,
so it's cheaper than the same part with the display tag on it.