Walmart is pitching the K4, or basic Kindle, on the front page of their advert this week. It's selling for the regular price, but they are throwing in a $30 gift card. That's not a bad deal, but I suspect that you have to mail in a rebate in order to get the card.
BTW, don't go looking for this on their website; I don't think they're allowed to list it. But you will see it in the online advert.