To celebrate Barbie's birthday, select Barbies, including the pictured SuperStar Barbie, are on sale at Smith's Marketplace for just $3 this week! There were 3 styles for $3 when I went earlier today. I purchased all 3 with no problems and there was nothing posting any limits of how many a customer could buy.
I've heard K-Mart might have this deal as well! There could be limits of one per customer.