Summer's winding down but the deals are heating up at GNC ! For two days only, they've put hundreds of their bestsellers on sale for $9.99 or less. Add $1 flat rate shipping to that price and you've got yourself a steal. Choose from vitamins, diet support, herbs and natural remedies, sports nutrition, and even accessories and beauty care. Over 400 items are on sale at final prices of up to 66% off! Take advantage now because this deal ends on 08/21/2013.