Went to the comic shop and picked up the Graphitti Designs Gallery Edition of
Batman: The Dark Knight Returns on a whim:
I had originally no plans of picking up the book due to having multiple editions of the book already, but it looked great in person so I had to pick it up. I always wondered why it was so high at $175. It turns out it's a much larger format than other Gallery Editions as well as IDW's Artist's Series, which showcases original art in the size of the art boards they were drawn on. This means it is one massive book.
For comparison sake, here it is compared to a regular Marvel omnibus: