Although the ads say it can be used for coin/relic hunting, and perhaps already has .......... well so too can ANY nugget machine be used for coins, jewelry, relic, etc... and yes, will get insanely deep. Ie.: "you won't miss a thing" when using a nugget machine for a coin-hunting purpose. But I think you will find yourself pulling your hair out when trying to use a nugget machine for coin-hunting. Do you really want to hear every single piece of bird-shot, every staple, etc....?
I think if you research it more deeply, you will find that the supposed "iron rejection" the GPX5000 touts, is only good for the top 5 or 6" inches. Beyond that, it becomes un-reliable, and the disc. function wains.
Because you see, the 2 goals of nuggets, verses coins/relics/jewelry, are almost diametrically opposed. The nugget guys want a machine that can detect pin-head sized targets down to the deepest they can get, right? But a coin guy DOESN'T want that amount of insane sensitivty to pin-head sized stuff. And when you consider that machines are designed from the ground up, for their intended purpose, it's not as easy as simply adjusting the controls to make a machine excell, in either arena. Yes there are cross-over machines. But they will not excell in the arena. As I say, using this GPX5000 as an example, research further, and I believe you will find that any iron disc. ability, fails after a certain depth. That may drive you nuts if you are hunting an iron-riddled environment. Might be ok for wide-open furrouged fields, where you have widen open digging liberty, patience, and need to reach over a foot deep on coins. But is simply un-practical to have that amount of squirrely sensitivity for most other coin/relic environments.
