[swengw]

Tim Cook says he's never read a bill of materials that was anywhere close to accurate. I believe it- the last time I got an iPhone replaced, I asked what they were doing with the old unit and the person said they were probably going to reuse the touch id sensor since that was one of the most valuable parts.

[janekm]

The Touch ID sensor value in the second hand market is not reflective of the cost to Apple... it’s expensive because there are no third party replacements, so the supply is restricted to parts taken from broken phones.

[otterley]

...Or newly manufactured ones.