According to PC Magazine, most UK residents have about £375 of unwanted but usable gadgets lying around their homes. Hopefully you don’t just toss them when you’re done with them since e-waste is a major source of toxins and carcinogens—and as guardian.co.uk points out, much of the e-waste from Western Europe and the US ends up in the ports of West Africa.

How can you be sure your old electronics aren’t causing any harm? It’s simple—sell them to someone else.

UK residents:

Loot.com and Gumtree.com both offer a forum to buy and sell used items.

BuyMyTronics.com buys new, used, and broken electronics from any location in the world. Payment is sent through PayPal within 48 hours of receipt.

US residents:

VenJuvo.com helps you calculate your item’s worth and then buys it from you with two payment options: PayPal or check.

Second Rotation.com purchases mobile phones, gaming consoles, MP3 players, and other gadgets to resell them. You could earn over $150 for one item.