Andy Prough writes: "Wal-Mart has put various Apple products on sale, including the iPhone 5, marked down to $127. The retailer normally sells the smartphone for about $190, and the sale price is $72 less than the $199 price set by Apple and its carrier partners when buying with a contract. That's an incredible deal for consumers, but the sales' timing raises flags about how well the Apple smartphone is selling. The sale started Friday. Typically, top-of-the-line smartphones start getting discounted if a new version of the device is close to rolling out. But in this case, the iPhone 5 is being marked down more than 35% less than three months after its release — and in the middle of holiday shopping season. Wal-Mart's Apple-product sale comes shortly after a UBS analyst announced he was lowering his iPhone sales estimates for 2013, saying he expects Apple to sell 5 million fewer phones than his previous estimate for each of the next three quarters."