Personally I don't think they are worth $8 bucks a unit. Once I take them apart there is about a lb of copper in each and then you have the leftover metal. If you cut them yourself for the copper its worth it if you got them for free but you are losing money to pay that much for each unit, you don't recoup it. I have also turned them in as motors once I have drained them for the .14 cents and up per pound, depends on how tired and lazy I feel that day.