If you watch model numbers closely many electronics manufacturers will make a special model for sale at places like WalMart that is cheaper than a VERY similar model sold elsewhere. You have to decide if the difference in specs and/or quality is worth the price break. Many people don't notice and assume it's the same model they saw elsewhere.
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"There is not a man of us who does not at times need a helping hand to be stretched out to him, and then shame upon him who will not stretch out the helping hand to his brother." -Theodore Roosevelt