C&V is pretty wide-spread....
I recently put up 2 sets of wheels on CL and answered an ISO for some more, sold a 3rd set. Didn't think much about it, other than having to drive 35 miles W to meet 3 different folks and still find a way to meet roccobike and pick up a mixte...all before 9 am.
Anyway, first customer, needed some cheap wheels for a 1983 Fuji frame he's building for "social' rides. Second customer was on her way to an MS ride, had about an 82-83 Team Fuji but also said she had a "fussy" bike. Third customer had a 1972 Puegeot and also rides a modern carbon.
The only modern bike I saw in 3 hours was roccobike's... but I know he has his stash..
Any more examples of "they're everywhere?"