If you are a paid member for at least 30 days and have 0 or 1 credit left, you can buy a 3-pack of credits. This usually costs around $35.88 $30.00 to $35.00 depending on current promotions, bringing the per-book cost down significantly.
While you can't strictly "buy" Audible credits as a standalone product on the standard Amazon retail site, you can purchase them through your linked account on the Audible site or by finding an audiobook on Amazon and selecting the "3 extra credits" bundle option on the product page. How to Get More Credits buy audible credits on amazon
Switching to an annual plan like Audible Premium Plus Annual gives you all 12 or 24 credits upfront, which lowers the average cost per credit to about $9.50. Important Restrictions If you are a paid member for at
LitRPG Books - Discounted audible credits for kindle users - Facebook How to Get More Credits Switching to an