me personally for laptops i just sell as parts or if they are too old scrap as a whole, since they are a huge pain to break down if you have alot, if you got the time though, tear down a few and look at the numbers for your situation, also with some old laptops they have removable cpu's that can be taken out without tearing the laptop all the way apart, and obviously, the ram, hard drives, and some optical drives are worth pulling for scrap/resell