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Wal-Mart today drastically slashed the prices of its iPhone 5s and 5c stock, potentially signaling the impending launch of Apple's next-generation smartphone.

Perhaps in an effort to clear its stock and make way for the next batch of iPhones this fall, the big-box retailer is offering in-store discounts starting today.

The 16GB iPhone 5c is available for $29 (down from $49) with a two-year contract from AT&T or Verizon. Its big brother, the iPhone 5s, is also on sale for $99 (down from $149), but you'll need a two-year contract with AT&T, Verizon, Sprint, or U.S. Cellular.

It remains unclear whether the 32GB or 64GB versions are also marked down. Wal-Mart did not immediately respond to PCMag's request for comment.

Costco shoppers, meanwhile, also now have a chance to get a discount Apple product.

Despite a move four years ago to terminate the sale of Apple products, Costco appears to have had a change of heart, this week adding the latest iPhones and iPads to its shelves.

But the spotty selection isn't quite what you'd find at the local Apple Store—or almost any electronics shop. Only a handful of colors are available on each carrier, and don't expect to find any device larger than 16GB.

Sprint, AT&T, and Verizon customers can swing by the store to pick up the iPhone 5s for $77.99. AT&T users can also get a blue iPhone 5c, though it will set you back $99.99.

T-Mobile, meanwhile, is offering the 16GB iPhone 5s, iPad mini with Retina display, and iPad Air only at select Costco Wireless Kiosks.

If you're not sure if you should get the 5c or 5s, meanwhile, check out iPhone 5s vs. 5c: What's the Difference?