What is the value of a 1964 penny with a small bust of Kennedy superimposed on its face?

This is a standard US cent stamped with the Kennedy bust after leaving the Mint, probably as part of a rash of products to honor JFK and/or to show the alleged similarities between the lives of the two Presidents. The etching/stamping actually ruins the collectible value for most coin collectors, although there may be some after-market value for those few fans of these coins who don't already have one.