How much can I sell my iPhone 4? - 1

So I just got my iPhone 4 this past summer. So it's like 7 months old and everything works good! I have the latest update on it, which is the iOS 7.4 or something like that. It's 8gb and white! The front has a couple scratches on it but non visible but the back is not original back! Like 5 months ago I scratched the camera lens so I had to get a new back then a couple weeks ago my friend dropped my phone an shattered the back so I put a new back on but instead of a white back I got a Leopard print back! So now I have a custom back and it looks great! It cost $50 for the back the second time but anyways I want a new phone and Instead of being a spoiled brat like always I want to get the money on my own for this phone! Which cost $100! I also would sell my life proof case that was $75 for $30 then Sell my otter box that I bought for $50 for $20 then my other cases I would sell for $5-$10! So I'm hoping with the price of selling this phone and everything together I will have enough!

As much as you want

At most $170 on Ebay. If there are some defects minor (cosmetic), I would price it no less than $130 but no higher than $170

180 maybe if it's in good shape or take it to your phone store and trade it in for another phone or money.