might be able to help depending on what country you live in and budget.
I have 3, 1 X Red + warranty BTC 0.090 / £750,
1 x Black + warranty BTC 0.090 / £750
1 X white no warranty - BTC 0.081 / £680
Have more iPhone models available if interested.
Anyway the prices are roughly between £640 and £700 for used one and £700+ for new sealed one with warranty
Hope that helps, if interested in going ahead with a sale let me know. Have a registered business which deals with phones so your receiving it directly from our stock. Full details can be supplied after sale including links to the website, social media+ much more for peace of mind.
If not worried about warranty I would recommend a used one due to the price savings. Has been allot of fluctuation with apple prices so good to be cautious about this as well since prices could lower soon to so wouldn't advise investing into a new one unless can afford it of course..
hope that helps.