My grandfather recently passed away and many years ago he buried a large metal/iron item in a plastic container in his yard. Odd I know but I'd like recover this item. I only have a general area to go by and I don't believe the item is more than 12"-18" deep. Its in sandy panhandle Florida soil. I need some info from some professionals about what detector I might need to get and if I will even be able to find it. Any help or information would be gratefully appreciated.