Is it all that valuable? I'm just going to speak to my limited knowledge. So I come home after a nice hunt. In my case hunting mostly clad & jewelry. So say I have , 35 to seventy five coins, maybe sometimes a silver ring, couple times a year even a gold ring. My guess that with the right coil 80 to 90 plus of these targets fall no deeper than five inches. I believe they could all have been found by any machine Ive owned. It's when I get into a sports field with deep cover or a sandy beach . I gotta have that extra punch. Even if its only a inch or two. But how much different are these machines to each other? Back in the early 2000's I bought a machine off a very good American company for about $250. There was plenty of clad and good rings to be had back then. That little machine really cleaned up and was fun to use. Over the years the company came out with a second , third , and a fourth version of the same machine. Now just how much difference was there between them all? Take all the machines that have to be computer up dated. Thats nice but how big of a difference (in finds)doe's that make? Up against Ole reliable. The difference is first the site ( someplace that has promise ) than a hunter with some smarts & luck that can pick the place apart. Than a machine that hunter knows inside and out. Thats what makes the difference.