71 and I live in Oregon. I started out saving money and buying any old .22 pump I could afford when I was too young to drive. Later moved on to lever action Marlin repeaters, which resulted in buying a Marlin Ballard. 
That Ballard was my downfall to my levergun interest, and soon I had sold almost all of them, and reinvested in Ballard rifles. Then that expanded to Remington singleshot Rollers and Hepburns, and later other American single shot rifles. So it's been strictly single shots for the last 35-40 years.
I hunt with my old single shots for deer and elk, but haven't hunted the last couple years with bum knees. But I still get to the range near me as often as I can.

81 Indiana between 70  74 good hunting white tail enjoy single shots  Ballard low walls high walls stevens going nation Muzzleloaders events love our country always welcome coffee strong Max hornet

I am 75 and live in Northwest Missouri. I shot NRA Highpower rifle & Smallbore prone until 3 years ago. I am an old phoneman with bad knees. As a break from competition I started shooting single shots. I find beauty in Hepburns, Highwalls, & Stevens. I have just two Ballards. It is amazing what craftsmen could do without Computers & CNC machines.

83, Colorado for the last fifty years. Built my first muzzle loader as a teenager. Won a third place in the Texas State matches
Good many ML's in college to buy groceries. Learned I could not make the living I wanted as a gunsmith.
Burned out on ML's after serving as State president for two years. Made knives, engraving (never got there), boats, and boots.
Retired and started single shot rifles. Made several actions, rifles, and scopes. Recently sold my larger bore rifles, like loosing your kids.
Slowing down some, Still shoot at least once a month, weather permitting. Hope to finish the striker action 32-40 this winter.
Good run, good people and mentors. Still enjoy it thoroughly. The Ballard is still my favorite,
Chuck

Wow hard to imagine the current age group that still has a serious interest!

WHY?   Just because the "clock has struck midnight" some time back doesn't mean a person has to quit doing what he loves to do.  I turned 77 in September and still try to shoot at least once a week, even in the winter.   I'm not out to win any matches, just love to keep the barrels on my originals rifles warm.   You are only as old as you think you are.  Or, "you aren't old until you know what you want to be when you grow up."    I ain't got there yet!  Still, it is sad that there don't seem to be many youngsters interested in anything but exercising their thumbs on digital gizmos.

George

Might as well join in here! I’m 77 and began collecting single shots about 25 years ago. As our youngest son has a pawnshop and sporting goods store, I also get a number of other interesting rifles through him, especially if they’re a rusted up mess. I enjoy refurbishing them as much as shooting them. Probably about two thirds of my collection are Ballards, Winchester 1885s, Hepburn’s and a number of Marlin levers. 
I just retired about 2 1/2 years ago after a career of owning businesses and politics serving  as a conservative republican. Still living on the ranch, but use it most of the time as a shooting range now!

50 years old and in the southwest suburbs of Chicago. 
    I started collecting military rifles in my late teens then started adding military pocket pistols when I turned 21. 
    When I was about 30 I met John Gillette of Classic Guns Inc who introduced me to fine British shotguns. My collection transitioned from militaria to English doubles. Then I bought an English Farquharson rifle and my interest in single-shot rifles really took off. Soon afterwards I transitioned again from SxS shotguns to American and English single-shot rifles.
    When I moved to Alaska I met collectors/shooters like Michael Petrov and John Wills who introduced me to the custom gunmakers such as Schoyen, A.W. Peterson, A.O. Niedner, Zischang, etc. Because of them I met many more single shot collectors.
    In 2016 we moved back to Illinois where I met more collectors and shooters. I have learned so much from every friendship.