Brand new Boxed Samsung S3 with Essentials Pack ?

I have a brand Samsung Galaxy S3 for sale. I have obtained this phone via my upgrade, however i do not like the size of the device as i am quite happy and very used to my iphone. I have the receipts from carphonewarehouse, phone will be sold with receipt. This phone is being sold for 500 in the shops and mine is as good as the one you would buy in the shop.