Mine was made in 1967, and I shoot it regularly.
Rugers as a general rule, are not highly collectible like Winchesters, Colts & S&W's.
Too be really valuable to a collector, yours would have to be new, unfired, in the box, with all the paperwork.
Since it is probably not, shooting it (within reason) is not going to hurt the value if you take good care of it.
On the otherhand, I wouldn't burn the stock for firewood and put a heavy barrel and target stock on it either!
rcmodel