Is anybody interested in getting those?
They are free for the taker and can be used to make a self playing piano (either acoustic like it was or even digital). Some simple DIY messing around will be needed.
Alternatively, they can be used for making your own version of https://pianoclack.com/forum/d/393-new-approach-to-digital-piano-actions which is what got me interested into it in the first place. However my wife is very wary of me starting yet another DIY project, and we don't have room in the house, nor I realistically have much spare time anymore.... so they can be yours!
Solenoids of this quality cost tens of dollars each, and here you can have them at the cost of shipping which will be around $1 each (sorry, not shipping them individually, must take the whole lot).