Sorry, Wal Mart, Target, or Toys R' Us usually just sells them for $14.99. The only way you can get one cheap is when they go on clearance which won't be for quite a while.
There are also some on Amazon. There are a few V5 sales there too. I bought my V5 and V5.5 there. The V5 was only $4.99 and the V5.5 was $10.00! The shipping price was low so we bought it! The cheapest V5 I saw was $14.99 which is the original price to pay. Hope I helped!