Those will be nickel or plated brass connectors and, boardsort doesn't buy them.
Meaning there's no sense in cutting them off. However if you already did, or have a SMALL pile laying around you can toss them in midgrade. It's generally a fare rate for "dirty" connectors that have crap attached like parts of boards.
Then again if you went that far take a few more minutes to cut the contacts free. Those ribbon and pin connectors will still be dirty connectors but clean free rca connectors usually go as "dirty brass". Regardless of base metal.
Boardsort DOES buy gold pin connectors.
-- my grades are my own and do not represent an offer from boardsort, nor are they guaranteed. Please keep that in mind.