- Wonder Stories & Science Wonder Stories (note this collection is mislabeled as of If magazine). (9 GB).
- Fantastic Adventures. (12 GB).
I haven't downloaded any yet - so not sure how healthy or accurate the contents are. Mostly CBR/CBZ files.
Update 1 Nov 2012: There is now one more torrent by the same guy - Famous Fantastic Mysteries. (4 GB).
Related: Fiction from old pulps.