[derriz]

Your tone is overly aggressive.

And I don't know how I can be clearer than in the comment you are replying to: "My point was that it reasonable to be reluctant to spend $200 to $250 to replace a small component of a device that is only worth $300."

Which part of this sentence is unclear?

Your Porshe analogy is not appropriate. If a Porsche with a working gearbox is worth 35k, then yes, I'd be reluctant to spend 30k on a gearbox alone.

[b20000]

the device is worth $3,000 but listed for $300 because it is used and likely has problems