Amazon had discontinued the Kindle DX months ago. But it has brought it back just recently. It is a 9.7 inch E-ink e-reader you can use indoors and outdoors. It is not a cheap e-reader, so if you are picking one up, you may want to give these Kindle DX cases a look:
iPearl mCover Leather Folio Cover: an affordable folio-style case for your Kindle DX. It has a built-in inner pocket to hold money and credit cards.
Periscope Kindle DX Flip Case: not only holds your tablet but also has a light so you can use your e-reader at night.
TrendyDigital WaterGuard Plus Waterproof Case: want to take your Kindle DX to the beach? This waterproof case is what you need.
Kindle DX Leather Cover: the official Amazon case for the Kindle DX. This stylish leather case has a hinge and strap system to hold your e-reader safely.
Incipio underGROUND Kindle DX Case: this wool textured handmade pouch holds your e-reader safely as you take it with you everywhere you go.
It is not clear for how long Amazon will continue selling Kindle DX devices. But if you are spending $299 on an e-reader, you should consider getting one of the above cases to protect your gadget.