Some coin-collecting notes: The easiest set to collect at the moment is the 50 State quarters (1999-2008). The Jefferson nickels are surprisingly collectible; a recent look at $50 in nickels yielded 39P, 40P, 41D, 43S, 43P, 46D, 48D, 52P, 53P, 53S, 54P, and 54S. Half dollars were silver until 1970, so rolls frequently contain silver half dollars, easily recognizable by their edge. Pre-1982 pennies are solid copper, and are worth about 2 cents each. Other coins are harder to collect; wheat cents (pre-1959 pennies), silver dimes, and silver quarters (pre-1965) are extremely rare in 2007 pocket change. The year 1909, the start of Lincoln cents, was arbitrarily chosen as the starting year.