Great! Why don't you come here and do all that work for me!
(Sorry just a snarky lead in for my commentary).
I try to avoid selling at ebay if at all possible. I did just sell an iphone 6 and honestly if you don't sell regularly it's a bit of work plus you have fees and have to worry about the buyer complaining. In my case they wrote to me saying that they thought it was a 6 plus and would I take it back if they paid shipping? (No was no returns) So the withheld feeback and filed a complaint with ebay. It went in my favor (obviously it was listed correctly) however the entire experience I would have rather avoided and it took time and effort and writing to clear it up.
The advantage of a trade in program like this is if you are not trying to squeak out the last dollar in value you don't have to worry as much when you ship the item that everything is 100% perfect.
Edit: Of course the money does matter so I am talking in general about selling on ebay of course I'd see exactly what the delta was taking into account all fees and time involved.