Exactly. HP had that down to a "science" on their inkjets: one board (the only real "value" in the product) on the back where it could be easily removed and the rest of the printer (virtually all plastic except for the rails for the carriage) can get binned.
"Hello, is this HP parts? I'd like to buy that tiny piece of plastic that holds the carriage during the paper advance cycle. You know, if's the little white thingy about the size of a paperclip... Whaddya mean, you don't sell it? A first class postage stamp has got to cost more than the whole damn thing??!"