You can easily break something taking apart old laptops with brittle plastics, and parts can become broken or lost easily. Unless you know what your doing and have experience with laptops you should sell them whole.
I don't pay much (or anything) for vintage laptops where somebody was poking around and screws and parts are missing. For example old I series IBM Thinkpads have a short cable between the keyboard (controls the trackpoint) and body that is very easy to rip when removing the keyboard. Most old systems have custom HD mounting sleds and adapters, if they are missing then the system is pretty much useless.







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