Will iPhone 14 still be available on Friday??

I have a 12 pro max right now and AT&T is offering 1k for a trade in. I’m wondering with the release of the 15 on Friday, will the credit for my iPhone 12 Pro Max go down to 750? Since they now have to account for any iPhone 14 trade ins. I’d rather take advantage of the 1k credit and get an iPhone 14 pro.

If the credit drops down to 750, will the iPhone 14 pro also get a price drop? Any idea on how much of a price drop it’ll get on Friday??