Over the past few years I've remodeled several rooms in my house and, in the process, upgraded most of the electrical wiring. Several circuits had 15 amp wiring (14 gauge) and I upgraded most of them to 20 amp (12 gauge). So, to make a long story, a have what seems like miles of used 14 gauge 2 and 3 conductor copper wiring stored in the garage. I'm assuming the local scrap yard will buy this but what I'm wondering is if they pay more if the wire stripped of the sheathing and insulation. And, if so, how much more? Is it worth it to at least remove all of the sheathing? Insulation too? What's the going rate for used copper these days?