Amazon has started another of its "Buy Two, Get One Free" Blu-ray sales. If you add three eligible titles to the cart, the one with the lowest price will be free. As of this writing, there are 347 titles in the sale, which can be browsed as a whole or by genre. This offer will expire on August 21.
Some of our more observant forum members have noticed prices of eligible titles going up just before the sale went live. So, as the saying goes,
caveat emptor.