This deal has ended.
Amazon again has It's Always Sunny in Philadelphia: Seasons One, Two, Three, and Four on sale for just $44.99, despite the set's standard $100 price point. If you purchase it with It's Always Sunny in Philadelphia: A Very Sunny Christmas, you'll get another $10 off, dropping the holiday DVD to only $6.99 ($51.98 for both). If you haven't seen it, the show follows a group of friends who own a bar with their father (Danny Devito) and is perversely hilarious. Shipping is free and there's no tax (except KS, KY, ND, NY, WA).