It goes for other coins as well (pre '64).
If I recall, pre-1964 nickels may be worth more than their quarter counterparts.
I used to go over to Canada all the time around 1979-1980 to buy gas. They would give you a gallon for a pre-1964 nickel. At the time, I lived near the border and it was only 35 cents for the border crossing. You tell Customs you're going to buy gas and they would wave you through.