I remember when 5 could buy a candy bar, and penny candy was substantial.
Now the 25 boxes of candy have about the same quantity as one to two penny candies from my youth.
So equating the quarter and nickel after the fed goes away seemed really not so far fetched.


To check my thinking I went to Coinflation.com.

20 Washington quarters
Base Metal Coin Melt Value Calculation
Generated on August 24, 2017.


Values Used:
Total Face Value: $5
Coin Type: 1965-2014 Washington Quarter
Copper Price: $2.9740 / pound
Nickel Price: $5.2993 / pound

Answer:
Total melt value is $0.79.
(Exact value is $0.79193769301006)

20 Jefferson Nickels
Base Metal Coin Melt Value Calculation
Generated on August 24, 2017.


Values Used:
Total Face Value: $1
Coin Type: 1946-2014 Jefferson Nickel
Copper Price: $2.9740 / pound
Nickel Price: $5.2993 / pound

Answer:
Total melt value is $0.78.
(Exact value is $0.78381499164515. $0.29207391625415 worth of nickel, $0.491741075391 of copper.)

Zinc pennies would likely not be used for much.
Real pennies might get melted into a more useful larger form factor.

I believe that fractional forms of real money such as constitutional dimes, quarters, and halves, as well as the 1/10, 1/4, 1/2 ounce silver rounds will be useful forms to possess for commerce.
Silver dollars and one ounce rounds or bars will be for larger purchases.
Over 10 ounce bars and any poured pieces will be suspect.