Amazon on Monday has kicked off a special pre-Christmas promotion that offers users $30 off on any Kindle Fire HDX 7 or Kindle Fire HDX 8.9 model as long as they make their purchase on by 9PM on December 23.

In order for users to get the $30 discount, all they have to do is enter the promotional code “SANTAHDX” at checkout, when ordering one of the 7-inch or 8.9-inch new Amazon tablet versions (see Source links below).

The offer is valid only in the U.S., and it’s limited to one discount per customers, as long as supply lasts – we’ll note that not all Kindle Fire HDX are in stock with Amazon right now. However, there still are plenty of Kindle Fire HDX models to choose from and take advantage of the new deal – check out the following list compiled by Android Guys:

• Kindle Fire HDX (Wi-Fi, 7-inch, 16GB) – $229
• Kindle Fire HDX (Wi-Fi, 7-inch, 32GB) – $269
• Kindle Fire HDX (Wi-Fi, 7-inch, 64GB) – $309
• Kindle Fire HDX 8.9 (Wi-Fi, 8.9-inch, 16GB) – $379
• Kindle Fire HDX 8.9 (Wi-Fi, 8.9-inch, 32GB) – $429
• Kindle Fire HDX 8.9 (Wi-Fi, 8.9-inch, 64GB) – $479
• Kindle Fire HDX 8.9 (AT&T 4G LTE, 8.9-inch, 16GB) – $479
• Kindle Fire HDX 8.9 (AT&T 4G LTE, 8.9-inch, 32GB) – $529
• Kindle Fire HDX 8.9 (Wi-Fi 4G LTE, 8.9-inch, 64GB) – $579
• Kindle Fire HDX 8.9 (Verizon 4G LTE, 8.9-inch, 16GB) – $479
• Kindle Fire HDX 8.9 (Verizon 4G LTE, 8.9-inch, 32GB) – $529

Keep in mind though that in order to take advantage of the prices as listed above you’ll still have to agree to see ads on your new Kindle Fire HDX, as these are Amazon Special Offers prices. Without Special Offers, you’ll only get a $15 off discount.

This is the second Kindle Fire HDX deal we’ve seen in a matter of days, after the company kicked off a simple zero-interest financing solution for its tablets.