Is it worth it to buy a kindle ereader? ?

I personally prefer using my android tablet but I prefer the audio books and ecomic books to text only kindle books. I didn't use the Kindle (kindle 3) I bought much.

Many people do prefer the read only ebook reader to avoid distractions when reading like email, facebook, twitter, and so on.

Day after Thanksgiving and Christmas prices can make one more affordable and desirable. 

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hell yea it is i want too it is way better than going to the library

Depends on how much reading you do.  The e-ink is a lot nicer to read on longer than a tablet screen, battery life tends to be insanely long.

I would say: that depends on how many books you buy each year.

It certainly reduces the cost of purchasing books to read.

Also: consider how you plan to use it.

For example: I would like to purchase the Anchor-Yale Bible Dictionary

which is about $600 in print

but only $300 in electronic form

BUT

not available on Kindle e-readers in electronic form.

So for me, Kindle e-readers are out

and I have to choose among generic Android e-readers

(which the Kindles are not).

Depends on how much ebook reading you do.  There are dozens of Droid and iPhone apps that let you read books on your phone or tablet.  If you already have a device that can read ebooks, I see no reason to spend money on a kindle.