The best part about pulling a 'worthless' old penny out of the ground is the split-second image that rockets into your mind, after you read the date, that looks something like this....
... and, if only for an instant, the cavern of time that separates the past and the present narrows just a bit, affording you a totally unique opportunity to commune with times gone by via a straight and uninterrupted line between right now, kneeling on the ground next to a hole and whenever that coin was lost 60 or 70 years prior.
The money means absolutely nothing. It is an experience you cannot buy in a store nor pay for on any guided tour. Not everyone understands this but those who do don't need it explained.