Preston Rook

Preston Rook said leaving US mint proof sets in cases increases their value.       

If you’re thinking about getting into coin collecting, you don’t have to start by spending a lot of money.

Preston Rook said he found many of his coins by asking the bank for a bag of coins of a certain denomination (such as quarters or pennies) and going through them. You can still find rare coins this way -- some quite valuable, others only slightly more valuable than face value.