I have been wanting to get into this hobby for some time now. I have recently come across the opportunity to purchase what I feel are 3 quality machines, but i only need 2 of them. I'll most likely get a CZ-21 in great condition for around $600. I live close to a saltwater bay and have 3-4 beaches within minutes so this seems like a good choice. I also want to hunt for Civil War relics, and coin shooting. My options for the land hunting are a Whites M6 for $400 and the AT Pro for $500. The M6 is used in really great shape and the AT Pro was opened but never used. It's really hard to tell from all of the sites out there which of these is the better buy for what I want to do with them. I'm asking for your input as most of you have been doing this for decades. Thanks for any input that you might have.