>and charge whatever you want when they're all gone.
Where does Walmart do this? I've never been to a Walmart where pricing was out of line. Moreover, predatory pricing is litigious at best and illegal at worst.
A good example of this behavior recently has been Walmarts big push on groceries. I saw it first hand when they did it in a small community I lived in. I also worked at Walmart as one of my first jobs so I had an inside look at things including their anti-union programs and pricing strategies.
Google "Walmart predatory pricing", it's a well-documented issue.
I suspect that it is "predatory" if it puts you out of business. It becomes illegal if you can convince a legislature to intervene (witness what happened in France, to Amazon[1]). Consumers don't tend to complain about lower prices.
Where does Walmart do this? I've never been to a Walmart where pricing was out of line. Moreover, predatory pricing is litigious at best and illegal at worst.