Junk Silver in the numismatic circle refers to worn circulated silver coins. These are circulated worn coins and do not have any collector value BUT, the value lies in the silver content. The price of junk silver is now commandind a small premium about spot. It used to be cheap. You could get them below spor price but not anymore .Junk silvers can still be found in pocket change. Keep collecting because Silver price is still going up. Jefferson nickel does not have any silver. Only those "Wartime" (1942 (partial) -1945) and it has only 35% silver. But continue looking. That's part of the fun. You might want to try the flea market for a bargain. Have fun ,all nickles and dimes before 65 have silver in them Only war nickels (1942-1945) has 35% silver. And they silver is bounded with magnesium (?) makes it harder to extract the silver, most buyers wouldn't mess with them.
Best deal is pre-1965 dimes, quarters, half dollars, Morgan & Peace dollars and the 1964 Kennedy halve dollar all 90% silver.The 40% Kennedy & Eisenhower coins are good, just takes more of them. I got burned a lot starting out buying coins.