iPhone 15 Pro Max

Brand new in the box iPhone 15 Pro Max 256Gb, in Black Titanium. Unlocked, take it to any carrier. I ended up with an extra phone from an asurion claim on my daughters iPhone (long story), anyways I meant to return it within the 30 day window but got busy and kept putting it off until I realized I missed my window. Now I'm stuck with a brand new iPhone I don't need. As well as the payments. I'm looking to get as much as I can so that I can pay this off. $900 obo.