Blu-ray movies are so expensive still. I rarely buy them.
Why is that? Massive licensing fees or something?
Pay attention also to which Blu-Ray it is. Straight Blu-Ray only packs are pretty cheap now, if you see one going for a lot it's either a deluxe edition or a 3D Blu-Ray (which usually come with 3D, Blu-Ray, DVD, and digital download and maybe a bonus disc too).
I've picked up quite a few older movies on the cheap. LotR complete deluxe boxed set for $30. Terminator complete boxed set, $20. 300 for $7. Etc...