64 U.S. PROOF COIN SETS. Including two 1968, two 1969, two 1970, four 1971, two 1972, one1973, four 1974, five 1975, two 1976, three 1977, two 1978, four 1979, two 1980, five 1981, five 1982, five 1983, four 1984, five 1985, and five 1986 Estimate $500-800