For comparison, Secondipity's deal of the day today is the
Kindle Keyboard 3G Special Offers with "light use" for $90.
Secondipity sells customer returns and has
great reviews on Amazon (4.7 stars), and respond to bad reviews, trying to fix the problem.
Differences: 3G and Special Offers for $90.
So IMHO you've gotten good pricing advice in this thread.