Bests & Worsts Reviews from Amazon

BROKE AFTER FOUR WORKOUTS!!! GAVE ME A BLACK EYE, NOT SAFE!!! I bought these on Craiglist in their original sealed package. The fourth time I used them I was doing a benchpress when the largest plate fell off and hit me on the side of the head giving me a black eye. I found that the tab on the plate that fell off that connects it to the handle had broken (see pics). This must have happened during one of the three prior workouts, since I examined the plates when I first opened them and everything was fine. I called Bowflex/Nautilus to buy a replacement plate. However they would not sell me the part since I bought the dumbbells second hand. I wasn't asking for a replacement set of dumbbells, I wasn't even asking for a free replacement part, I was asking to buy a new plate. I understand why they wouldn't cover these under warranty since I bought them second hand, but I was asking for them to be replaced. I just wanted to buy a new plate. Instead they sent me a new pair of the smaller 552 dumbbells, which seems odd. My only guess is that the 1090s are prone to breaking and causing injury and they do not want to be liable. Very disappointing / frustrating after spending $600+