A lot of the stuff they are buying is old, obsolete, and no longer sold by the manufacturer. So some of the time- like, way more than one might think- they're

A lot of the stuff they are buying is old, obsolete, and no longer sold by the manufacturer. So some of the time- like, way more than one might think- they're buying the parts from an open market that is a lot seedier than one would think would be part of such an important supply chain.