How much can I get for a mint condition 128G Jet Black iPhone 7 plus?

I'm selling my mint condition iPhone 7 plus (128G) and I was wondering how much I can get for it? I have kept a case and screen protector on it as long as I have had it so it's in the same condition it was in the day I bought it brand new and it works like new as well. No scratches or smudges on the jet black finish. How much money can I ask for it?

Probably $200-$300

Could check Apple.com about any trade in value or sites like Gazelle or look on eBay to get an average.

Maybe $500, but it's a used phone, not a rare coin or car, so "mint condition" really does not mean anything.

Things people will want to know, what is the IMEI/ESN so they can check it with the current carrier to find out if it has been fully paid for, otherwise it will be useless to them. Have you paid off your debts to the carrier, if not the phone will be blacklisted and again, useless to them.

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