Best Buy offers Planet Earth: 6-Disc Special Edition on Blu-ray Disc for $19.99. Choose in-store pickup to avoid the $2.99 shipping fee. That's $3 under last week's mention of a shipped unit and the lowest price we've seen for this edition. (It's a current low by $18.) This 6-disc set includes all 11 of the 50-minute episodes from the series and 110 minutes of behind the scenes footage.