In conjunction with the announcement (archive) that he will step down as moderator of the /r/darknetmarkets subreddit, Gwern has released a 1.5TB archive of content consisting of his own scrapes of various darknet markets as well as material sourced from others spanning the time period 2011 through 2015 with the majority of the content dated 2013 onwards. A description of the files included in the torrent reads:

There are ~89 markets, >37 forums and ~5 other sites, representing <4,438 mirrors of >43,596,420 files in ~49.4GB of 163 compressed files, unpacking to >1548GB.

Further information on the archive can be found here (archive).