This story doesn't pass the smell test.
"Walmart.com will ship the TracFone Motorola GSM C139-4 right to your door for $24.94"
...and an unlocked Motorola C139 sells for 69.99
http://www.worldelectronicsusa.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=WEU&Product_Code=MCDBUGCP591&Category_Code=M5
Starting to see the arbitrage potential here?
Yet I can sell a hard drive on ebay at a higher price than a person could get shipped free to their door from Fry's Electonics.
Not everyone knows what things cost or where to get them. There's a reason why convienenence stores can sell a soft drink for $1.50 while you could buy it for $.20 at the Walmart across the street.