The ad has been up for a couple of weeks but I think it's an ongoing thing. If you happen to be in Oakland, give these guys a call...not affiliated....
https://sfbay.craigslist.org/eby/zip/d/free-speakers-speaker-parts/6296818382.html
https://sfbay.craigslist.org/eby/zip/d/free-speakers-speaker-parts/6296818382.html