Not since 1905 had the San Franciso Mint produced as many Barber Dimes as it did in 1916, then it followed up with over 10 million Mercury Dimes. The 1916-S Barber Dime is popular as the last year of its type, yet it is common enough to be very affordable. Consider this -- the mintage of the 1916-S Barber Dime is less than a third of that of the 1916 Barber Dime, yet it sells for the same price in most grades. Sounds like a good value.
The 1916-S Barber Dime is plentiful in MS63 and MS64, then the population drops off in MS65 and MS66, eventually hitting a stopping point at MS67, where only a couple are known. Some, high-grade examples have splotchy toning or negative eye appeal despite having nice surfaces, Coins with good eye appeal should command a premium.