Amazon offers its Prime members The Dukes of Hazzard / The Dukes of Hazzard: The Beginning - Double Feature on DVD for $6.49 with free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise, shipping adds $3.98.) That's the best deal we could find by a buck.
Want the entire original series? Warner Bros' DVD Media via eBay offers The Dukes of Hazzard: The Complete Series 1 - 7 on DVD for $133.70 with free shipping. That's the lowest total price we could find by $65. This set contains all 145 episodes on 38 discs.