Hi, wanted to ask you if you can easily buy used (runtime 2 or 3 digits) original BMW brake sets from ebay without hesitation. Where are the dangers, except that you no longer have a warranty/guarantee? Can the discs be warped or have latches, etc..? Does someone have experience because you can save a lot… So what e.g. https://www.ebay.de/itm/166669581282?…