UpTrade offered the highest offer to buy my iPhone 8. They kept me informed via texts and emails through every step of the process. I really liked the video showing them removing my phone from the shipping box and checking that it turned on. They even emailed me to say that the phone was in the condition I stated it was and reiterated the amount I would be paid for it. I opted to receive a check through email and got that check within two weeks of being receiving the email about payment. This was the first time I had ever sold a phone. Great experience and I highly recommend them.