MacNN reports that Apple Store app for the iPhone now allows the user to check to see if the local Apple store has the iPhone model of his or her choice in stock.
You can see the "check availability" during the checkout process. Also, you can also order an iPhone and pick it up at the store as well. As of today, there are still lines waiting for the iPhone 5s.
And if you missed it, Apple sold over 9 million of the new 2013 iPhones so far. And if you're wonder, supposedly the 5s sales leads the 5c sales by a factor of 3.5x to 5x depending on the market.