Outstanding, A-company. I'm not sure all folks realize the value of such a find.
Pages 309/310 of O. Richard Norton's book ,"Rocks From Space," offer a small blurb about metal detectors used for hunting meteorites. He hypes White's but obviously all detectors can do the job -- providing they're set for reading iron objects.
According to Norton, newer detectors can be fine-tuned to differentiate between human iron "trash" and possible meteorite material. I balk at that a bit but understand the thinking of tuning out small trashy readings -- and essentially increasing the chance of a meteorite strike, so to speak.
By the by, your find is a museum quality specimen, as is. It is likely not sliceable, though it takes a pro to decide that. I once sliced (w/ diamond saw) an olivine rich stony/iron meteorite and sold the polished slabs for well in excess of $10,000. The finder had been offered $1,000 for the whole piece -- and was that close to selling it. The finder and I split the profit and he rushed off thinking he could easily find another one. That was 15 years ago -- and neither of us have come close to finding any more rocks from the sky.