Amazon has several Audible Audiobooks for $0.82 each. They are a mix of abridged and unabridged titles.
Northanger Abbey
Sense and Sensibility
Mansfield Park
Sherlock Holmes. The Collection
Great Expectations
The Invisible Man
The Three Musketeers
Anna Karenina
H.P. Lovecraft Short Stories
The Strange Case of Dr. Jekyll and Mr. Hyde