From amazon:
Returning Kindle
You can return your Kindle for a full refund within 30 days of the day you received it as long as it is in new condition and returned with all the original packaging, manuals, and accessories. Your Kindle is not eligible for return and refund after the 30-day return period has expired.
(found here:
http://www.amazon.com/gp/help/custom...deId=200144510 )
The first day I got my Kindle, I had a bit of buyer's remorse and thought I'd never use it, but I really do, every day

.