Need help in decomposing the e-waste

Hi guys,
I would like to get your advice on decomposing the e-waste. We were storing the old printers in an unused room. But now, we are planning to make use of that room, so we need to remove those unused printers from there. But we are confused about its decomposition. Where would you guys dump e-wastes? I have seen online a disposal service providers https://www.essentialdisposal.com/ and thinking of getting their services for disposing off those printers. But before that, I would like to know your suggestion regarding the e-waste decomposing.

If these are unused 3D printers which can actually print, you might offer them here, to readers looking for something to experiment with. Otherwise, look for a disposal service that's local to you, so you don't get burdened with shipping costs for things you don't want.