Amazon offers Prime members Arrow: Season 1 on Blu-ray for $9.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.98. Best Buy charges the same via in-store pickup.) That's the lowest total price we could find by $3.
Best Buy offers Fargo: Year Two on Blu-ray Disc for $19.99. Opt for in-store pickup to avoid the $3.99 shipping fee. That's the lowest price we could find by $7. It includes all 10 episodes and bonus material.