If you think its insane to spend that amount of money on it (essentially: it's not worth that much to you), then you holding onto it instead of having $1300 is pretty much the exact same scenario? By holding onto it you're saying it is worth that much to you.
It sounds like believing you hunted down a 'deal' causes you to wildly change how you perceive value at an emotional level.
I would probably do the same thing. It's just funny to see expressed on HN where everybody complains that advertising and marketing are evil/scams and proclaims loudly how rational they are.