Pretty good deal going on on Amazon right now. Buy any of the blu-rays from the list and get $10 Sony Movie Cash good towards This is the End tickets. A lot of these are 10 bucks, so you basically get the ticket for free (or the blu-ray, depending on how you look at it).
http://www.amazon.com/gp/feature.html/ref=tsm_1_fb_s_dvd_mnmv55?docId=1001195811
http://www.amazon.com/gp/feature.html/ref=tsm_1_fb_s_dvd_mnmv55?docId=1001195811