hi Tommie, yes, i look only for gold nuggets, cuz other metals, like silver, copper, etc they seldom exist independently. and once found, probably much deeper underground, i can't get them out. so only gold nuggets. for oz soil usage, so i prefer minelab, although there's a few manufacturer in USA. there's one dealer of minelab, who's telling me there's 300 guys ahead of me on the waiting list. i placed the order there, i saw some guy even ordered 50 minelab (au$6100), Gee, the dealer told me gold found in africa(sudan), so lots of orders for there. previously i want to buy a SD2210, cuz it's au$3000, and also able to detect nuggets, thinking of function and price, i chose SD2210. but out of stock ! minelab stopped making it, cuz they can't satisfy orders for GPX4500, even they increase productivity 6-7 times than before ! ( making millions, uh ?) so i HAVE TO order that GPX.
contacted a maker from germany, their cheapest detector, visible one, costs euro 7000. i can't afford it. i see they also have gun-like long range detectors.
http://www.okmmetaldetectors.com/index.php?lang=zh
im thinking of being a professional gold nugget detectist, yet haven't found any similar minded partners, and they all sugget me forget this, cuz gold rush is over, or do it after having a stable income, etc. i'm not sure if i was stubborn, right or wrong.