I've got a detector and have found some coins with it! Only crappy old East German pfennig made out of aluminium, but coins nonetheless. If also found a part of a bomb (in England) and old spoons, tools, a badge, a horsebrass and bits of lead etc. It doesn't really matter what you find, it's nice to go out and get a bit of fresh air. A useful tip though, if you do try it make sure you have a handheld pinpoint device to find small treasures in clumps of dirt after the detector has done its bit. Withoug a pinpointer you can waste hours of a day looking in holes when you've dug out the metal object and it's stuck to your spade!