Amazon has an interesting BD-related "lightning deal" going on now: for a
very limited time, you can buy
Firefly: The Complete Series for only $25.49 (71% off MSRP). This offer expires today at 2 p.m. PST, or when stock runs out. The lowest price for this title was $34.99, at another Lightning Deal in November 2009.
Thanks to forum member MikeDaWiz.
Update: all discounts have been claimed in less than 15 minutes. This promotion is expired.