I just looked up replacement heads for my Panasonic Arc5 and they're like $50 for the foil and blade set. That seems insane to me considering I paid $180 for the whole razor. So basically every year I'm supposed to spend $50 on parts which means over 5 years I'm paying almost as much for replacement parts as I did for the razor itself. How is that reasonable? I know the heads wear out and need replacing but damn that's expensive. Are there cheaper options that work just as good or do you really need to buy the official Panasonic parts? My buddy said he buys generic replacement heads on Amazon for like $20 but I'm worried about quality. Anyone tried the cheaper alternatives or is it worth just paying the premium for official parts? Just seems like a racket to me but maybe I'm wrong.