As expected Walmart has started selling iPhones since Sunday. It is now offering the iPhone 3g handset in roughly 2,500 stores, at prices of $197 for the 8GB model and $297 for 16GB versions. Wal-Mart is the second independent retailer and fourth overall to sell the iPhone 3G, following Best Buy, AT&T, and Apple.

In other iPhone news, AT&T has lowered its prices on refurbished iPhone 3G units for a limited time, bringing the initial price of the iPhone below $100 for the first time. The company is selling 8GB models for $99, while 16GB models see a similar discount to $199. The lower prices will be available only through December 31, after which they will return to $150 and $250, respectively.

AT&T’s site states “Refurbished iPhones are previously owned devices that have been unused or lightly used and returned during the 30-day trial period. Each refurbished phone is independently quality tested and loaded with the latest software to meet current factory standards. Some refurbished iPhone 3G devices will have minor scratches.  Refurbished iPhone 3G devices carry a warranty of 90 days or more.”

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