You did not say how many, how clean or what they were made of . Nor did you say how much field modification has been done to them. Unless very clean most of the used peds we have taken out of use have wound up at the local scrap metal dealer or plastics recycler. Last resort the local dump. Sometimes the MSO wants them back to replace other older models.
This is CABL.com posting #121561. Tiny Link: cabl.co/mFMP