Hi Maui,
I got my Bore Scope (its made by Rigid) thru MSC the Industrial Tool company ....kind of neat thing to have in caves or holes or places critters maybe in. I have few things a treasure hunter should have in his truck.
My coolest device is an element detector, I can locate any element its programed for(like gold, silver, platnum( and some compounds up to a mile away! Depth to over 2,500 feet thru earth, water, rock, steel, anything...it only locates that element so if you had a gold coin in a 1/2 acre full of cans, pull tabs, nails, or any other junk it will only locate the gold! Very expensive but really collapses the time frames in your search for valuables. I bought it to locate silver mines..found 6 in KY 4 in Ohio and a gold vein in Indiana, plus coins. If you have a good reliable lead and know the treasure is there and cannot locate it with a metal detector send me a PM, we will work something out. Been all over the country with it helping people locate stuff...gold nuggets and placer in California, Gold veins in Georgia, and lots of others. I work on a percentage of the recovered items plus part of the expenses.