Between now and 11pm ET on Tuesday, March 12, you can download some 700 first issues from Marvel Comics for free.
And.. it's legal!
The ComiXology Comics app for iOS and Android is offering 700 Marvel comics as part of a Marvel promotion announced at this weekend's SXSW festival in Austin, Texas. You could probably see the full list of 700 comics on the ComiXology website (which lets you buy them and even read them through a browser), but that site is getting hammered right now.
Alternately, download the free Comics app to your phone or tablet and you'll see the promo for the 700 Marvel #1s front and centre. ComiXology is an account-based service, so any comics you purchase and download will be readable on any device you have that supports their app. Here's the link to the iOS version of the app. And here's the Android one.
The roster of free comics includes 22 first issues from the new Marvel Now line, 46 first issues of various Avengers comics, 11 Fantastic Four first issues, 17 Hulks, 56 Spider-Mans, and even 118 X-Men comics. Where to start? It's a bit overwhelming, to be honest.
How about... Daredevil Vol. 3 #1 and Hawkeye #1. Both are in the "Marvel Heroes" part of the promotion. Trust me.