hello iam a just starting collector with a couple questions first i have in my possesion 42 1964 kennedy silver half dollars these were given to me by my grand mother when i was four.She got them new in 1964 and kept them until she gave them to me. they were un touched for 35 years until now, i have them they were never circulated ,they are in pristine condition. my question is what are they worth. also on ebay today i bought a 1963 ms-67 fbl franlklin half dollar the seller said its value on pcgs was 25,000 dollars here is my question i bought it for 35 dollars what is the deal here ? no one is going to pay that much for a coin if the professional coin grading company says its worth that much then why does it sell so cheap . im just trying to figure out if ive been had or did i pay a good price. thank you. Darrell