Likely through today only, Amazon has the full Planet Earth BBC Series on the now-discontinued HD DVD format priced at just $19.99, a $10 drop from our last mention. Narrated by David Attenborough, this stunning documentary takes a look at hundreds of interesting facets to our planet. It's received 4.5 out of 5 stars from over 1900 buyers. Do note that this is the discontinued HD DVD format: it will not play in standard DVD players or Blu-Ray players. Shipping is free and there is no sales tax (except KS, KY, ND, NY, WA).