I usually use Gazelle.com but decided to give Nextworth.com a try for my iPhone 6 Plus. BIG MISTAKE. They gave me a good offer and I sent my phone in to them. When they receive my phone they said it was not in the condition I had claimed and gave me a lowball offer. I told them to return my phone which they did but they did not include the original box that I sent to them. Now I have to resell this phone on my own without the original box. I will never use this company again. I should've stuck with the Gazelle.com.