Apple Selling Unlocked iPhone 6 and 6 Plus on Web Site
"The 16GB unlocked iPhone 6 costs $649 and the 16GB unlocked iPhone 6 Plus costs $749. "
So just how much does the 16GB model costs?
The 16GB version of the iPhone 6, which is the smaller of the two, is $649.
The16GB version of the iPhone 6 Plus, which is much larger, is $749.
The really big news is...
The variant Apple is shipping for these unlocked units are A1586 and A1524 (i.e., the Sprint/international variants, which are the same as the AT&T/Verizon/T-Mobile models but with additional support for several TD-LTE bands).