Why am I need one Kindle?

When I saw the Kindle I thought 'it can be useful for me', so why?
You can ask me? So Marina, why do you prefer one Kindle than one Ipad? The price, just this, when one Kindle cost U$259,00 one Ipad cost U$1.500,00.

I'm really like read, I like take articles on the Internet and read, but always I use paper, and nowadays we know that we can't waste nothing. One thing important when I read one article is I'm really like write and do notes, I don't know if Kindle do this, I need do more research about this.

Ebooks are cheapper than books, I will read more and pay less. I have one notebook and one smartphone, but one is to much big and other is much little, the Kindle is on the middle.