I have a pristine, barely used DX with cover (Kindle DX Graphite?), maybe I should throw it on eBay? There are already a couple of listings if you're so inclined.
I ended up grabbing a used Oasis, since my primary use case of reading papers has declined outside of grad school (and all of today's papers assume you have color printing). At this point I think I'm just going to use it for reading books.