What is the resell value of an iPhone X 256 GB locked to ATT?

What is the resell value of an iPhone X 256 GB locked to ATT?

About $500 on eBay. But bear in mind that before you sell it you have to go to the Apple website and clear it to be sold. Otherwise the phone will automatically shut itself down and report itself as lost or stolen. This also holds true if you got the phone on contract and haven't completed your contract if you sell the phone before your contract is complete the phone will shut down and it will put itself on the lost or stolen list.

500-600$…