Anyone familiar with both Garrett GTA 500 and Fisher CZ-3D? I have the older GTA but haven't detected in years. I am wondering if a newer machine would be a good idea. There have been many changes in detector technology I am sure, but I am wondering if there is a great difference in detectable depth. My 20 year old GTA is a digital machine and still works fine. My four inch loop works great in trashy areas. It is tempting to buy a new machine, but not sure how necessary it really is. Thanks in advance for any input.
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