How much will the iphone 6 will cost (read)?

I want to buy a iphone 5s but i notice people talking about the iphone 6 is coming so i don't know if to wait or buy it?
but how much will the iphone 6 factory unlocked will be people say its going to be 645 the same as the iphone 5s right now other people say its going to be more expensive but what you think i don't want people saying ohh no one knows i know but you can comment your thoughts and well should i wait or buy the iphone 5s because no one knows if the iphone 6 is coming it can be one year or 2 years or more

The iPhone 6 is expected to launch in 2 sizes, 4.7" & 5.5". The 4.7" is expected to have the same on contract, off contract & unlocked prices the 5s has now. The 5.5" may add $100 to each cost.

As far as which to get, up to you. 5s now or wait until September for the 6.