It seems like nobody knows how to dispose of old electronics properly. Fortunately, gazelle.com will purchase your unwanted cellphones, tablets, laptops, computers, and other electronic devices, even if they aren't in working order. An iPhone 5C in good condition, for example, will bring you $40. You can use the payment as credit toward the purchase of another device, or Gazelle will send you cash. Learn more on the Gazelle website.