I was watching coin opp one day and they had a man that found a 1982 D copper penny and he sold it for 18,800.Well i found one in my pennys the face is a little beat up but you can tell it is a 1982 D small date.I need some advice how to sell it

I am not specialized in numismatics. However, I have seen a few error coins, and I contact with very competent numismatic dealers. Most error coins are not worth more than a regular coin. However, you can easily get over a dollar for a penny, which proportionately is 100 times more, but in absolute terms, it is just one dollar.

Most error penny's need to be in mint state 65 or higher to be considered extremely valuable