Ron,
Supposedly, there is not enough copper to support all the new building going on in places like China and India, so they are buying up every bit they can get hold of, and because it is a sellers market, they can command their own price.
Last year, copper and copper based alloys at my scrapyard was about 2 pounds per kilo, now, like Jo's supplier, it is 4 per kilo.
The same sort of thing is now starting to happen to ferrous based metals as well, so expect some rather large price rises in the future, both in scrap and retail.
In fact it was only a few years ago that both Cedge and myself warned about imminent price rises and suggested stocking up while the prices were still low, I did, and I now have a few cwt of brass and bronze in stock.
My suggestion now would be to buy as much as you can from scrap yards, while you still can, as for sure, the way things are going, the shortage will get worse, and so prices will soon hike upwards.
John