My daughter is looking to sell her gold iPhone 8 64GB, and I thought I'd give you Geekzoners first crack. It was replaced last month by Apple under a warranty claim, so the phone itself pretty damn close to as new condition. The headphones have long since departed this world, but she still has the charger and cable. She also said she can chuck in a couple of phone case with the disclaimer (her words) "they are girly ones".
She's noted that these are selling for $700 on TradeMe, so that gives you an indication of what she wants for it. Feel free to PM me your offers.