They take any donations you bring to them including old studs from old houses (early 1900s)
I know they take some random things but, siding..? It is not worth the effort to remove undamaged, then with sun fading and all that you would need the proper J channel, or F channel to go with. Only full panels are worth it, nothing less than 12ft. As someone who does Siding I wouldn't concider it, but, call and ask. It won't hurt.
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