Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca
My brother in New Mexico says he goes out looking for them all the time. There is a lack of much metal trash in the deserts where he look and you just have to be able to dig for them. He says they are worth thousands of $$$. I know he likes to use a DFX, but he said he was looking into buying a Infinium LS or Surf Pro PI because of the deeper depth.
Some people found one in a dry wash near where I live in southern colorado. It was about the size of a soft ball and turned out to be a very rare variety. They are out there. There is a place in Arizona where a large meteorite exploded over the ground and there are many fragments scattered over a large area. Seems that people who go there have pretty good luck. Good luck in your search. That would really be something to find one.