New members can get 1 Year Audible.com Membership from Amazon for just $99.50 (reg. $149.50) This offer includes 12 credits to use to purchase audio books. Also, the Plus Catalog offers free titles for members now. You can cancel anytime, but note that after your first year ends, you'll pay the regular $149.50 price.
Also, you can try Amazon Prime for free for 30 days!