atomic m1 regulator

At this point I believe my regulators are procreating, because I have far too many sets. I need to offload. I recently purchased this M1 set in March and they have been used on maybe 15 dives. There is a ding on one reg that I show in detail in the attached pictures. I am assuming this happened...

Atomic M1 Regulator Streamlined Open Water Reg Package Used It comes like in the pictures with a first stage and second stage, the octopus is also an identical high-performance backup as the primary regulators. It works as it should. * like all used scuba diving equipment it should be...