There are far more out there owned by late teens and low 20's guys than older guys.
All the lower mileage ones I have seen even that were single owner, were beaten each and every time they were driven too.
so they are owned by teens that have another car that they DD and keep a shelby around to only drive when they beat the shit out of it?
if you want to see low mile cars that are beat to shit check out some hellcats.