Apple will charge $20 for their legacy headphone compatibility system.
If it's an analog breakout cable then eBay will charge $3
It cannot be an analog cable because Apples proprietary Lightning connector is digital-only.
Furthermore Lightning requires an active ID/authentication chip available only by licen$e from Apple.
That ensures that you won't be able to buy sensibly-priced accessories like simple cables, adapters, etc.
Apple must enforce their lucrative proprietary Walled Garden scheme.
Of course, the knock-off artists in Asia have proven themselves to be very clever.
So it seems within the realm of possibility that they can produce a counterfeit authentication chip.
Of course, then Apple could pull an FTDI stunt and brick all your counterfeit gear.