Riddick Collection (Blu-ray) for $11.46. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order to qualify for free shipping. Here is a screenshot for your reference. The set includes The Chronicles of Riddick, Pitch Black, and The Chronicles of Riddick: Dark Fury. Most places have it for about $27.
This deal has expired as the price has been raised. Congratulations to those able to get in on it.