Whatever happens when you look at the gold price it should be quicker to pay off a new machine for an experienced prospector. Based on Aussie gold price it was around $1300 an ounce when the 5000 came out, $1500 for the zed, $2300 for the 6000 and now sitting at $3600 with a bullet. Just have to spend the time on the ground and get out and enjoy the beautiful countryside.