What's the most interesting thing you've found with it? Or what was worth the most? I've found 2 hand hammered silver sixpences from 1592 worth about £60 each and some 12th Century trade tokens.
I got rid of mine after finding misc bits of metal and it was taking up too much time. Its something you need to have a buddy or a club. I did it in the park once and got abused by teenagers.