National Geographic Channel 5-DVD Collection $14

One great way to appreciate the Mother Nature and understand its impact on human world is to understand it more.   The reputed National Geographic must have some offerings that are affordable to me.  My three selection criteria are:

1. price
2. length of the DVD/Blu-ray
3. customer rating

I am not ready to pay $20 to pay a 60-mins DVD. The only one that meets the requirement from National Geographic is "Best of National Geographic Channel 5-DVD Collection"

Ship to US only. $13.99 "5 discs; 5 programs; approximately 360 minutes"


Not available from Amazon store itself.  +$40 for brand new from Amazon small-business stores.


I ordered one today with shipping and tax. $20