While my wife was wandering around a Jo-Anne's fabric store on a recent trip to Akron Ohio, I noticed that they sell short length's of what appears to be copper wire.
They had tinned, enamelled, and bare from size 16 to size 26 in lengths of about 10 feet or so. Maybe someone in the US could check this stuff out to see what it really is. We don't have this store in Canada. If this is copper wire, it would be useful in re-winding coils etc. 73 John VE3AMZ Waterloo Ontario