my son makes a point of checking out any skips in our village, he takes any kind of electrical wiring and collects it then takes it to the scrapmetal yard to be weighed in. electric wire (unstripped) brings him in around £80 a month usually. builders/plumbers/electricians discard it and he reaps the reward for recycling it. Tip for anyone thinking of doing it, never burn the plastic coating off before weighing it in, it is illegal apparently due to environmental laws and the yard won't take it off you with burn marks on it for that reason