This one caught my eye, but by the time I clicked on it, someone had bought it: 1964-D KENNEDY HALF DOLLAR Littleton Coin Co UNC. CLAD "Wow," someone thought, "that seller thinks that 1964 Kennedy half dollars are clad! I can get $15.00 (okay, $14.50 this evening) of silver for $7.87!" Alas, for people with up-to-date eyeglass prescriptions, the Littleton plastic wrap clearly says "1984-D"...
You guys have it all wrong. That was a rare 1964-D (for Dearborn, Michigan) Mint special production coin for eBay sales only. Chris