Amazon has an interesting BD-related "lightning deal" going on now: for a
very limited time, you can buy
Family Guy Presents: Something Something Something Dark Side for only $11.99 (60% off MSRP). This offer expires today at 2 p.m. PDT, or when stock runs out. The lowest price for this title was $12.87, in late February/early March.
Update
All discounts have been claimed.