Today only, Amazon lowers the price of each season of The Simpsons DVDs to $13.99. This is a great price to watch the older (and funnier) seasons of one of the longest-running sitcoms in TV history. Most seasons are well-reviewed, and each includes all episodes along with commentaries and featurettes that didn't make it on the air. Shipping adds $2.98, but if you order 2 seasons or more shipping is free. Sales tax is only charged in KS, KY, ND, NY, and WA.