Amazon has an interesting BD-related "lightning deal" going on now: for a
very limited time, you can buy '
Planet of the Apes: 40 Year Evolution Blu-ray Collection' for only $49.99 (61% off MSRP). This offer expires today at 6 p.m. PST, or when stock runs out. The price history for this title shows that the
cheapest it has been is $57.95, and then for a limited time as well.
Update:
All discounts have been claimed.