Audiobook publisher Tantor, which has given us a number of nice Classics freebies in the past, is holding a Buy 1 Get 1 Free sale for the downloadable MP3 versions of their audiobooks directly from their website.
The coupon code to enter at checkout is
bogo8, and the sale is good until October 30, according to an earlier newsletter I received, which apparently put it as some sort of tribute to Steve Jobs revolutionizing the computer industry and thus making downloadable mp3 audiobooks available to all. Or something.
Here's the link to list
all of their qualifying titles which you can re-sort by price/title/bestseller etc. "Regular" prices (already often significantly discounted from the versions you can get via Audible, though the latter has higher quality sound formats available and these are just MP3) range from around $6 to $24.
It seems you can use the coupon as many times as you like. Must be equal or lesser value, yadda, yadda, yadda.
Happy listening!