The older Kindle e-ink readers and current Kindle Fires have that feature, known as Text-to-Speech. A computer voice reads books to you in odd fashion.
If you're looking to save money, you might check if your library system lends digital audiobooks. For classics, LibriVox.org offers lots of free readings of classic books (out of copyright), read by volunteers. The quality is hit or miss, but that's the price of freebies.
Like Twerppoet says, I'm willing to pay for quality recordings. I like Audible a lot. The prices are reasonable, service is great, and there often are sales.