Hit it hard! I spent the last month or so working on a private home built in late 1870s that was at one point a hotel. It has been vacant for the last 10 years or so. Have found 5 Indian Head pennies (1874, 1882, 1885, 1893 and 1905), one 1936 buffalo nickel, 3 Mercs (1940, 1941, 1943), one Rosie (1954), two Washington quarters (1942 and 1950), one 1943 war nickel, and one 1941 Canadian silver quarter. Plus all the clad, pull tabs, bottle caps, wire, nails, and other miscellaneous pieces. I think in total I have found almost 300 coins. Oh yeah, also have found several pieces of jewelry - some junk, some nice pieces.