I'm not sure why I always avoid buying into this sale, as The Sandman is perhaps the best comic series ever; perhaps because I already own it in multiple physical versions. But anyway, the week long sale from DC/Vertigo is on tons of Sandman and Sandman-related greatness. Sale ends 11/16/15, $.99 singles and $5.99 collections.
The Sandman 1-75 and Special 1; ten collections and Endless Nights original graphic novel
The Sandman: The Dream Hunters 1-4; collection
Death: The High Cost of Living 1-3; deluxe collection
Death: The Time of Your Life 1-3; same deluxe collection
The Dreaming 1-60
The Dead Boy Detectives 1-12; two collections and one original graphic novel
Neverwhere 1-9; collection
The Books of Magic 1-4; collection
Black Orchid 1-3; collection
The Children's Crusade 1-2
The Girl Who Would Be Death 1-4
Midnight Days original graphic novel
Witchcraft 1-3
Witchcraft: La Terreur 1-3
Destiny: A Chronicle of Deaths Foretold 1-3
https://www.comixology.com/Sandman-Sale/page/8705
Also, a week long sale from IDW on their remastered versions of the Image original (classic?) The Maxx. The first three collections have a higher page count than the singles, but not the fourth; sale ends 11/16/15.
The Maxx: Maxximized 1-24 at $.99 each
collections 1-3 at $3.99 each (issues 1-4, 5-8, 9-12)
collection 4 at $5.99 (issues 13-18)
https://www.comixology.com/The-Maxx-...Sale/page/8704