Well, look at it this way... It takes a bit less than 1 hour for a DM run and with a 10 mil price, we get 1.4 mil per person. 30 minutes more and we can do a full Ravagers HM which is 6 times more money for us. A DM run isn't a 100% sure thing - stuff can go wrong, people can DC, crucial people can't make it, ... But we are 100% sure we can kill Cora, even if it takes a while. Rav/Tos HM sale runs are great practice for the upcoming NiM while doing the old content is just cancer.