I've been digging trash, four 5 gallon buckets to date of mainly road mesh, can slaw, beer cans, old fencing wire and barbed wire for almost two months on my first permission. I have found 2 Memorial penny's and some reusable lag screws and washers. I have thrown that quarter several times!! As a "Greenie" with equipment that is way smarter then me, I now call it my training site. Two acres, two months and two cents. So the only valuable thing I have found so far is education, experience with my MD and working on my gear setup. And the blessing of at least being able to get out and dig!. Next time I go there I am going to go over a section that I have already covered and see if I missed anything! God I love this addiction!