While pricing was not disclosed, we expect to see the Developer Edition of the Samsung Galaxy S4 tagged in the area of $650. That is the price of the Google Edition of the phone, which Verizon customers won't be able to use. If you're with Big Red and want to have your Galaxy S4 bootloader unlocked officially, the Developer Edition is your only solution. AT&T customers have the option of buying either the "Google Edition" or the "Developer Edition" of the Samsung Galaxy S4 if they want an unlocked bootloader out of the box.
No release date has been listed, but we would expect that the phone would be ready soon considering that it has already been posted in Samsung's online store.
source: Samsung via AndroidAuthority