Yes they're very similar. Rarely does a company feel the need to go out and design a part 100% entirely from scratch. It's why you'll notice things like monitor power circuits, sometimes down to the tiniest details like placement of tiny capacitors, look pretty much identical.
As for what the laptop parts are worth, depends on their age & how popular the laptop is (i.e. if you'll even be able to find someone who needs/wants a replacement fan or what have you)
Scrapping parts these days is pretty much not worth the effort. They used to use far more gold in the circuitry in ye olden days. Here's a tutorial though: Gold Recovery
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