I have about a 100 or so Gateway Keyboards.

I am in the process of removing the wire, mylar, circuit board and a metal sheet from inside them. I think these can be sold.

I was wondering what to do with the leftover pile of plastic keyboard shells (top & bottom). Can I sell them? Can I throw them in the trash? Is there a place I am supposed to take them to, in order to dispose them off properly? Can someone please advice.

I have never done this before. So I am sorry if anything sounds foolish. Thanks.