This might be what they're trying to buy here, dunno if it will work, but they've got the capital to try out a variety of things.
the perception here seems to be that Wal Mart only sells stuff that 'people of Wal Mart' want to buy
there's is probably plenty of room in Wal Marts brand to get at - 'we sell everything, down market stuff and up market stuff'
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wal mart's impact on Main Street - while (somewhat) real - is a separate question