Used Kindle

Why is the G3 used for on a Nook or Kindle?
I am going to get a e-book reader, but don’t know if I want to spend the extra money on that capability for that. If it is just to be able to download a book anywhere instead of the store, then I won’t pay the extra money for it.
You have 2 choices:
1. Wifi ONLY
2. Wifi + 3G
3G is a cellular network that mobile phones use to access the internet. This means you can access the internet and download books anywhere where you could get a cell-phone reception. If you just want to download the books at your house (which is what I do), then you get the WiFi model. Make sure YOU (using someone else’s internet is ILLEGAL) have a wireless internet connection though. Otherwise, you won’t be able to connect!
Cheap Kindle DX / Used Kindle DX : Amazon’s 9.7″ Wireless Reading Device