Here are the details:

Buy $75 or more worth of AudioBooks or DVDs and send them to a single U.S. Address using MediaMail service.
(Including APO/FPO, P.O. Boxes, AK, HI, PR, USVI, Guam, U.S. Protectorates, and All Non-UPS Addresses.)

MediaMail only available (3 to 8 business days from the day it leaves our warehouse).
MediaMail is most often provided by the U.S. Postal Service. A package sent using the U.S. Postal Service can be tracked only from the time it leaves our warehouse to the time it is delivered to the U.S. Postal Service.

This FREE Shipping offer applies to shipping and handling expenses on purchases of $75 or more of AudioBooks or DVDs. The $75 minimum purchase is calculated after any other discounts and/or coupons are applied. All merchandise sold at BestRussianBuy.com qualifies for this FREE Shipping offer except the following: oversized AudioBooks, Used & Out of stock AudioBooks, Gift Certificates, Gift Cards. In addition, charges relating to shipping, handling, gift wrapping, and taxes will not be included to meet the $75 minimum. The FREE Shipping offer will not apply to any order where cancellations or returns reduce the amount of qualifying purchases to less than $75; BestRussianBuy.com reserves the right to charge applicable shipping and handling costs to any such orders. BestRussianBuy.com may change or discontinue this FREE Shipping promotion at any time.