I HAVE BEEN M/DING FOR JUST A FEW YEARS. I HAVE A BH TRACKER 4. IT HAS WORKED WELL FOR ME SO FAR. I GOT STARTED M/DING WHILE MY SON WAS IN HIGH SCHOOL. HE WAS A POPULAR KID AND ALL OF HIS FRIENDS WOULD COME OVER CONSTANTLY. THEY WORKED ON THEIR CARS AND LOST MY TOOLS. THERE WERE TIMES I HAD UP TO 15 KIDS AROUND THE HOUSE OR ON THE PATIO. I STARTED CHECKING MY YARD WITH MY M/D. TO MAKE A LONG STORY SHORT, I HAVE FOUND OVER 14 DOLLARS IN CHANGE SO FAR. IF YOU HAVE KIDS AROUND, DONT FORGET TO CHECK YOUR YARD. IT MIGHT SURPRISE YOU.