Searched the property (about 3 acres) of a 1830's home about 6 weeks ago. House is empty, will be renovated. Used my Cortes in Disc mode. Found 4 Indian head pennies ( 4 inches deep) in the back yard near a tree. Went back the following week and found one silver rosie, a few wheats and some modern coins. Went back today and 3 other guys were there, all with Minelabs. They said during the past week they found about 14 large pennies, one seated half dime, about 8 seated dimes and one seated quarter. And they said others were there during the week and they too had Minelabs. So today I was searching in All Metal mode to get extra depth. After 4.5 hours I came out with one flat button, nothing more. The other guys didn,t find much either, just one Indian head. Seems like not much was left. Now, I was there first and if I searched slower and deeper in All Metal mode, I could have found those 6 inch deep coins. Hope I learned something here.