Good deal on a fairly recent 4 movie box set. Will make a great Christmas present for a fan of the series (or Kate Beckinsale).
3 blurays for $20 be pretty cheap, same as getting it from UK: http://www.amazon.co.uk/Underworld-1-3-Box-Set-Blu-ray/dp/B001V7P31M/ref=sr_1_1?s=dvd&ie=UTF8&qid=1324981201&sr=1-1