I was checking on ebay the asking price of a Silver Dollar and notice the New Penny issued in 1972 was worth money.(it was changed to one penny later on.
Some sellers asking up to 6000:pounds !
I raided my change box found 7 of them!
Thought I am in the money till I started scrolling down the listings there are a number at 10p !
But always worth checking as the metal content in early coins can be valuable.