I didn't think anyone was watching.,
The percentage would be a bit higher considering those gifts from my father.
My oldest is from 1903, my newest from 1991 (manufacturer date, not my ownership) I just prerfer older weapons.
However, the chance you would get an honest answer today is very low. Determining the sample would be a horror.
I've not done a FFL transfer in 20 years, and in my circle of shooters I can't really think of anyone who does not try to buy used (meaning privately) long before dealing with a FFL.