SellLocked
SellLocked is an online buyback store that specializes in iPhones other trade-in services decline: handsets still under finance, blacklisted ones, and activation locked or iCloud locked ones, as well as iPhones carrying no locks at all. It also buys other devices, locked or not, in bulk. If your device carries one of those flags, SellLocked is often the only listed buyer that will make an offer on it. The sale, shipping, inspection and payment happen on SellLocked's own site under their terms.
Reputation
Scores are published by each platform, not by MyDeviceValue. Where a platform publishes a percentage rather than a five point score, the stars are a summary and the published figure is shown alongside.