The secondary market is often the supply chain of last recourse when a component product goes obsolete or is under production constraints. While it is possible to get high quality, genuine parts, it is also possible to get nonconforming, reworked, or counterfeit components. What is most frustrating is that it is increasingly difficult to differentiate genuine parts from their counterfeit equivalents.
Historically, the secondary market provided a mechanism for finding parts in short supply or at reduced cost. Today, high-reliability system manufacturers are less willing to risk contamination of their supply chain with potentially substandard parts in order to save a few dollars on the cost of a part. The proliferation of counterfeit components has led to a contraction of the secondary market and an increase in the cost of parts in the marketplace.