samsung galaxy s3 blue unlocked to all networks ?

hi, im selling a Samsung Galaxy s3. its in blue, i bought it from internet brand new, i used it for 20 days just dun like it, going back to iphone again. and its unlocked to all networks. i got the box n accessories what come with it. anyways the asking price is 400, but make me an offer and we can talk., thanx for looking.