Would you buy second hand fitness equipment? I usually buy weights second hand because weights are just weights. But what about a bench or racks? Do you feel safe using a second hand weights bench not knowing how it was being used in the past?
True, but some benches / machines are only rated to 100 kg, especially the cheaper ones. Not to say we can lift 100 kg, but if someone weighs 80 kg and lifts over his body weight (most serious people can) it will put a lot of pressure on the bolts and welded metal.