Of course everyone decides what he thinks is worthy of collectioning.I myself am sufficiently crazy to have 20 Peugeots and 3 Mosers and 3 Merckxs.
But the big difference with 1950's bikes is that after the war sports bikes were a luxury few people could afford andso remaining good examples are rare and thus expensive.Bike boom racing bikes have lots of charm and qualities but are not rare.I suppose that here in Flanders alone there must remain a 100 thousand UO8 and better bikes,in use as student or local transportation or in the back of the garage.So enjoy old steel but don't count on collectors prices.