The Marvel collections on sale have cycled.
https://www.comixology.com/comics-sale?list_id=4677
The weekly sale from DC is on a bunch of Futures End stuff.
Future's End 0, 1-3
Batman Beyond (2010) 1-6
Batman Beyond (2011) 1-8
Booster Gold (2007) 0, 1-3, 5-47, million
Frankenstein: Agent of Shade (new 52) 0, 1-16
Grifter (new 52) 0, 1-16
Hawkman (2002) 1-25
The Savage Hawkman (new 52) 0, 1-20
Stormwatch (new 52) 0, 1-30
Seven Soldiers: Frankenstein (2005) 1-4
Grifter and Midnighter (2007) 1-6
Flashpoint: Frankenstein (2011) 1-3
https://www.comixology.com/The-World...bGxDYXJvdXNlbA
A collections only sale on Scott Pilgrim from Oni, ends 12/11/14.
https://www.comixology.com/Scott-Pil...bGxDYXJvdXNlbA
From IDW, ending 12/14/14, another Star Trek sale. This one has 14 collections and 61 singles.
https://www.comixology.com/Star-Trek...Z2VDYXJvdXNlbA