Hackerspaces are probably your best bet. They might have the contacts. I would also specify that they would need to pick them up, or at the most just do one big delivery. Don't mail each one out to individuals. Ebay could work like that at a stretch, as I know some Hackerspaces are inundated with gear.

If that fails, just destroy them. Remove them from your life should be the priority you are literally dreaming above them every night.