I'm my opinion the price is a little to high. In my country I could buy that phone for around 150$ brand new in the shop. Even though your phone is also almost new, it was still opened and we cannot know how much time you have used it plus the thing that you already had to sent it to the service for a repair(this will highly affect its value since if it already had a problem there is a chance of happening again). So I think the price for your phone should be around 100$ or so.