I've been wondering if it was worth stripping wire or not so today I decided to find out. My yard pays $1.10 for insulated, $2.60 for copper. I took two standard two prong power cords, one from a fan and one from a tv and this is what I came up with...

First cord insulated weighs 0.13 lbs = $0.14
After stripping copper weighs 0.02 lbs = $0.05

Second cord insulated weighs 0.15 lbs = $0.17
After stripping copper weighs 0.06 lbs = $0.16

Wow that's not good. I've been wasting time and losing money stripping wire.