I have repaired a number of headsets over the years and the life of a headset depends a lot on the build quality. The Peltor is a nice lightweight comfortable headset but, it does not stand up to rough treatment like a Clarke. It can be difficult to repair, as it uses a lot of crimps fitted with specialist tools, you can improvise with pliers but it won't last long.
Buying a second hand Peltor is like buying a second hand washing machine, you don't know its history!