i found the answer to the question on the interview about why 1968 pennies are worth more than 1967 pennies. here is the copy/paste answer: "The mintage of the 1968 penny is much less than the 1967. There were 1,707,880,970 1968-P Lincoln cents minted and there were 3,048,667,100 1967 Lincoln cents minted. However In 1968 they also minted 1968 coins in the Denver mint and the Sanfrisco mint. In 1965-1967 they did not have mint marks on the coins to try to thwart the collecting of coins. Although they were minted in all the mints there is no way to tell which one each on came from. Hope this helps." you learn something new every day.
