Andy, I'm so thrilled to see you responding to and defending this issue on the Quatro, which you actually "did write the book on". To me it's an honor to have you here on the forum, and I couldn't agree with you more on your post. I love the fact that your sticking to your guns on what you say about the Quatro still having great depth and usability, even though "The New Kid in Town", the Safari just came out. I've had my Quatro for at least two years, and I still can't say enough about the depth, the sensitivity, the notch-ability, the accuracy and the durability. Even though it doesn't have the two number readout for conductivity and ferrous like the Explorer, I think it gives out a lot of information, and as you state in your book, when you use the different audios modes, depending on the situation, I'd say, there's still a lot of bang for the buck here, and as far as it's value on the "market" going, down, like you say, it's no different than when a new hard drive or new computer or new car comes out, but to me, if I'm gonna get another detector, I think I'll just keep the Quatro for a spare anyway, or possibly for certain types of terrain. Thank you again for responding to diggitdawg's post, and I hope you write a book for the Safari too. Sincerely, Marc Trainor.