Hi folks. I don't know if this is the right spot to ask this, but I'll give it a try. I have come into possession of a Garrettes GTA 1000. It powers up and seems to work. Being a Whites person, I know nothing about this detector. Would any of you know if its a good one, how old, and if I decide to sell it, how much do you think it might be worth. Thanks in advance for your input.