There is a lot of USMLE audio stuff on
www.ApolloAudiobooks.com.
There is a list of all the USMLE audio titles on the
titles page.
Most of these audio books are either audio CDs or audio MP3s that can be downloaded.
If you shop around the project pages usually you can get a good deal. Either the
Lippincott banner for 20% off will help or you can compare the prices of the same audio programs from different sites by following the links. Check out
How to Find USMLE Audio . . .CHEAP.
There are also some
Free USMLE Audio Step 3 downloads.
The Gold Standard Audio CDs are great board prep, but expensive. On the Gold Standard product pages there are several options to buy used products. Check out
How to Find USMLE Audio . . . CHEAP or the
Product Pages. The used products and auction products aren't always available, so you have to check in from time to time to find a great deal.
Best of Luck,
Stark