Dealers who are forum sponsors tend to be pretty darn good dealers, because sponsoring a forum where customers don't like you is a counterproductive business strategy. If you want to know a dealer's reputation, just use the forum search function and see what people are posting.
Since you mentioned Big Boys by name, I can tell you that I've been following these forums for a few years now and they've got a good reputation. I wouldn't hesitate to business with them. NOTE: some other forum sponsors are also our dealers. I'm not trying to pit Big Boys against the others-- merely commenting on the dealer named by sigshooter71 in connection with a specific used metal detector offer.
$300 for a new Omega would be "too good to be true", but it's not unrealistic for a used one. I'd love to be able to say that they hold their value so well that used ones go for more than new, but the real world doesn't work that way.
--Dave J.
