I would like to by a pinpointer,but I have just bought a flat, so now all the money goes into that...
I have been searching around 8 years and tried my friends Garrett pin pointer this year and I loved it! At once I was confident that the object is deep under the coil, then dug a big hole and tried with pin pointer and realised that its a coin laying aslope in the wall of the hole. I was happy i did not harm it. And I learned that not all the big holes mean that the object is deep in the ground.
I think it is not an unnecessary thing. It is better to have one, mainly at deeper things.