Repair technician here. Yes we get a lot of hps with bad hinges, because they screw that super stiff hinge into the most floppy wet newspaper like piece of plastic possible. 200$ is reasonable because depending which side it's one you have to completely gut the screen assembly or the keyboard assembly (you use to be able to replace keyboards by themselves now you need to completely gut the whole computer)

Fuck HP but also fuck a lot of other brands cause they all pull this bullshit (dell, apple, Lenovo, Acer, Asus)