Ant, I'm not disputing that you find stuff including coins, with your GB2. For whatever reason, it clicks with the way you hunt.
The GB2 has been on the market for 17 years now, quite a few thousands sold, still a good seller, and I think I've heard two reports of people using them for coinshooting and being happy with them for that purpose. Both reports may have been yours, so we may be talking about just one customer.
There's stuff we design specifically for coinshooting, stuff that's designed for gold prospecting without any consideration for coinshooting, and stuff that's designed as multipurpose. If you take a look at what other major companies do, there's pretty much the same pattern. The reason that no company pitches a machine designed only for gold prospecting as a coinshooter, is that if customers were to make the mistake of buying such machines for that purpose, the company would rightly catch hell on the forums.
The GB2 is capable of detecting buried coins. No argument there. But for 99 out of 100 customers, they'd have done much better with something else-- heck, even with something from one of our competitors! By that standard, the GB2 is almost worthless for coinshooting, as I said. You just happen to be the exception to that rule.
If someone is asking on a forum if they should get a GB2 for coinshooting, the answer from the factory is no-- even though we sell 'em! "No" may not be the only possible answer, but it's far and away the best answer.
--Dave J.