I hate this argument of comparing prices now for BD vs. when DVD came out because there isn't any comparison!!! When DVD came out, and I was an early adopter, VHS tapes were expensive (because they cost so much to manufacture) and poor quality compared side by side with the advanced features of DVD!!!
This is not the case now!!! DVD is still a cheap alternative, especially if you want to buy new release films every Tuesday which I normally spend about $16.99 on unless it is a 2-Disc edition and the quality differences are hard to justify when you factor in great upscaling DVD players!!!
I know I can find cheap Blu-Rays, unfortunately I have a large DVD collection (just under 1000) and I will not double dip for a Blu-Ray unless I consider the movie to be really worth it, so I prefer to buy mostly new releases and you don't find cheap or on sale new release Blu-Rays!!!
So argue all you want about bargain hunting for cheaper Blu-Rays, they are hard to find unless you are wanting older catalog titles!!! I can buy Benjamin Button on DVD right now $16.99, how much will the Blu-Ray disc cost me???