Like gold and silver, the price of copper has been fluctuating
lately. Last week the spot price for copper was about $3.20 per
pound. My local industrial supplier so far has been fairly steady,
selling fabricated copper sheet in a variety of gauges in 3 x 4 feet
sheets to hobbiests and crafts persons like me for about $7.25 per
lb, with a set up fee of $8.00 to cut it to smaller specs on their
large shear. Just weigh your sheet and compare with that.