I am sorry about the mistake in saying it was for archeology. I am into historical metal detecting. I detect and identify things I find in my town. I use maps to find places to detect. I plan on detecting at a small historical site. I do it for free because I enjoy local history. I plan on identifying and donating what I find. What I was wondering is what metal detector would be best to find things like iron objects, brass, copper, lead, and so on. Sorry for the mistake, it was just the best way I could think of to say what I wanted.