What metal do I have?

If I'm not mistaken, the shielding used in most coax cable is aluminum. That along with the rubber insulation around the copper/aluminum core helps to block out "noise" or interference. Around my area, most yards won't even take coax, or the one's that do classify it as telcom/low recovery. Its been some time since I've taken any to the yard, but if memory serves me, I only got around .20-.25 per pound. Every yard varies on their payout and classification so call around and see what the yards in your area are paying. If you strip the copper core and take that in, it should be considered #2 copper or possibly #1 since its non coated wire and thicker then a pencil lead, but again it varies from state to state and location. Figure out if its worth your time to strip it by asking how much they will pay as is, and then strip a pound to see what the recovery and weight would be. For some its worth it, and others its not. I'll just assume that you have a wire stripper and are not doing it by hand. If the latter is the case I would take it in as is and focus your time on something a little more lucrative. Just my .02....

Up until now it's been worth taking it in as, I have always got around £1.30 per kg which if my maths is correct is about $1 per pound but now it's less than half of that. It's no work to take it in as is, my van is full of it every day all I do is bag it up and take it in every couple of months. Might just have to suffer the loss