Are you looking for new? There are tons of used readers out there. Even other Nooks like the Glowlight and Glowlight plus.
If you use Calibre, switching to a Kindle isn't a big deal, Calibre will convert for you. I just got a Paperwhite and the screen on it is nice. I don't like the lack of page turn buttons though so my Sonys are still my favorite readers.
I've bought the vast majority of my ereader collection used and not had any issues with battery life or anything.
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