Like comiXology and Marvel Unlimited, DC Entertainment and Image Comics are celebrating Comic-Con International with sales on select digital titles.

Through Tuesday, DC is marking the 75th anniversary of the Dark Knight by offering digital downloads of a whopping 750 Batman comics for 99 cents each. These aren't typical dollar-bin titles, however; they include The Dark Knight Returns, The Long Halloween, No Man’s Land, Year One, Hush, The Court of the Owls and All Star Batman & Robbin the Boy Wonder. If you're wanting to go way back, there are comics dating back to 1938, with Batman's debut in Detective Comics #27.

The sale extends across all platforms, including comiXology, Google Play, iBooks, Kindle Store and Nook Store.

Image, meanwhile, is offering 50 percent off digital editions of East of West, Lazarus, The Manhattan Projects, Nowhere Men, Pretty Deadly, Rat Queens, Saga, Sex Criminals and Zero.

That sale, which ends Monday, extends across  Imagecomics.com, ComiXology, Google Play and iBooks.