Treasure hunting. I am planning to do a treasure hunting down in Mexico City. The soil has a lot of mineral, rocky areas, uneven terrain. I need to look for a treasure which is to believe to be from 4-6 meter under the surface. I need from someone to help me to choose for the best metal detector for this job. I found to companies which I think they will do the job but if there are some series treasure hunter in here please e-mail me at meneses.blanco@us.army.mil the Lease Spence piece of equipment that I found which I think I will work for me is around 7 G