When I was a boy and we'd moved back to Plymouth from Singapore in the 1960's, my dad found two items in our new home while digging in the garden. One was a coin and the other was a military badge. The coin was encrusted with years of dirt but, after a lot of cleaning, I could see two heads on it which turned out to belong to William and Mary who reigned together in the late 1600's. The coin was a halfpenny and had amazingly lain in the ground for 300 years. The cap badge that was also found belonged to the Manchester Regiment but I've never been able to accurately date it. I always supposed that it was dropped by a soldier stationed at the nearby Knowle Battery. Nothing else was found and in the late 1970's, two crazes took off. One was skate boarding and the other was metal detecting. I would have probably been a lot cooler getting a skateboard but instead I went to Dixons and bought a metal detector (this was after unsuccessfully trying to build my own!). I think they were £19.99 which seemed a fortune at the time. I'm sure that other coins must have remained buried in the garden but I never found any of them. Searches of the area only revealed coins from the early 1900's while people told me that they had discovered coins hundreds of years old and even found Roman coins nearby. After finding endless junk, the hobby eventually became very boring and the metal detector lay in a cupboard for many months. I remember two things that I found with the metal detector that I would have rather not come across. One was an incendiary bomb and the other was an animal trap that I very nearly put my arm in (it was covered in leaves). One year later and I had a box of pre-decimal coins, bullet shells, a few military buttons and other things that I didn't have a clue what they were. Eventually, I gave it all to my nephew.
I don't know what happened to the metal detector but it disappeared sometime in the early 1980's.
A few years ago, I bought another metal detector off Ebay. Amazingly, it's lay in the cellar ever since! There are reports nearly every week of amazing finds, some of them quite local, and there's always that temptation to dig it out and to go exploring. I doubt I ever will though!