This price is more or less the same as a german repair shop charges. they sell the mic itself for 20€ so as its not a mass production it seems to be a reasonable price for the work. That just shows what a phone would cost when really produced in Europe and although I was a bit shocked when seeing the price for the first time and I would say its not worth it for a 6year old phone, it shows the obstacles this industry is facing by producing in china and think at the end the price is fair.