My first gun purchase:
I was 14. Walked into TG&Y and used S&H Green Stamps (redeemed as coupons toward purchase without ID either) for a single shot bolt action .22 rifle with scope from the ENDCAP of the toy aisle, and a bucket of ammo right underneath.
Shot turtles at the creek that were eating the fish all summer long.
Totally Anonymous purchase.
No serial on rifle. Still have it today.