Amazon has a promotion going on encouraging you to trade in your old Kindle. It sounds pretty simple. You answer a few questions about your Kindle’s condition to get a trade in quote. Then, print the label and send it in. Amazon will verify the condition and apply a gift card to your account.  You also receive a $20 discount good towards the purchase of a new Kindle, Kindle Paperwhite, Kindle Voyage or Kindle for Kids bundle.

You can trade in any of the following e-ink Kindles:

• 1st Generation Kindle
• Kindle 2nd Gen Free 3G
• Kindle 2nd Gen U.S. Wireless
• Kindle 5th Gen (black) Wi-Fi
• Kindle 4th Gen (graphite) Wi-Fi
• Kindle Touch Wi-Fi
• Kindle Touch Wi-Fi + 3G
• Kindle DX (white) 3G
• Kindle DX (white) U.S. Wireless
• Kindle DX (graphite) 3G
• Kindle Keyboard (white) Wi-Fi + 3G
• Kindle Keyboard (graphite) Wi-Fi
• Kindle Keyboard (graphite) Wi-Fi + 3G
• Kindle Paperwhite…