There is a special SDCC Promo to allow you to try Marvel Unlimited for a month for $0.99.
Promo code: SDCC14
With the doors almost ready to open for Comic-Con International in San Diego, Marvel Comics is opening the floodgates to their massive online comics archive, Marvel Unlimited—for only 99 cents. For the next week, a dollar will buy you a month of total access to Marvel’s online cache of over 15,000 comics, which range from books that hit the stands six months ago to the Golden and Silver Age classics of yesteryear.
http://www.wired.com/2014/07/marvel-comics-unlimited/
Comments
Too bad DC hasn't jumped on the bandwagon. They have a lot of content to be monetized, but I doubt any of the pre-New52 stuff would sell as trades....