Spent mushroom growing kits (Downtown Bothell)

I know most people throw out their mushroom growing kits when they're done with them (example kit pictured). If you've got one you're about to trash, I'd love to have it! I'll be using them to populate new mushroom substrate to grow even more mushrooms. I know this is a niche ask, but figured I'd try and save some from the landfill if they're out there. Thank you!