There are thousands of "good" bikes in sheds and garages. Around Derby you regularly see old Mercians, for instance, as hack bikes or used by people with no interest in cycling - they move down the desirability chain over the years. (until they become "classics" and the odd one is rescued)
Mercian, by the way, did (and to some extent do) produce some bikes - Campionissimo comes to mind, that were in the "non enthusiast" sort of price range. Certainly, many of these knock about Derby in the way that more known everyday brands do.
I'm told that a London financial institution decided that a cycle ride would be it's annual charity event, and bought 20 or so full carbon Colnagos.
Most of these will now in in sheds, given to kids, used to go for a paper etc.