I got an e-mail from Audible with a code for $25 off an Echo device at Amazon, through March 25: AUD25ECHO.
For Audible members only. Here's the fine print:
Spoiler:
This is a limited time offer. Offer valid from 12:00 a.m. (PT) on March 21, 2018 until 11:59 p.m. (PT) on March 25, 2018 or while supplies last. To redeem, use the coupon code noted above at Amazon.com to redeem a $25 credit to your purchase. The coupon can only be redeemed by the Amazon account that you used to sign up for the Audible membership and is non-transferrable. Coupon can only be applied to the following Echo devices: Echo Dot, Echo, Echo Plus, Echo Spot, Echo Show. The offer is valid for new devices only, cannot be combined with any other offer and cannot be applied to previous purchases. The coupon can only be applied once, and used for a single device. If the cost of the device is less than $25, you will forfeit the remaining offer credit in your account. Once you have received your $25 credit, you forfeit your right to redeem any further discount on an Echo device you have already purchased. Offer only applies to products sold by Amazon.com or Amazon Digital Services LLC (look for "sold by Amazon.com" or “sold by Amazon Digital Services LLC” on the product detail page). Products sold by third-party sellers or other Amazon entities will not qualify for this offer, even if "fulfilled by Amazon.com" or "Prime Eligible." Shipping charges and taxes may apply to the full value of discounted and promotional items. Offer discount will be allocated to the eligible item in your order. If any of the products related to this offer are returned, your refund will equal the amount you paid for the product, subject to applicable refund policies. Unless an Amazon Gift Card is the stated benefit of the promotion, promotional codes or credits (including those placed directly in accounts) may not be redeemed for Amazon Gift Cards. Offer is limited to one per customer and account and may not be combined with other offers. This offer is non-transferable and may not be resold. Audible reserves the right to modify or cancel the offer at any time. If you violate any of these terms, this offer will be invalid.