Hey if you don't mind having the books as PDFs, Far Future Enterprises sells CD-ROMs of all the 1st edition material on one disc and all the 2nd Ed. material on a second disc.
They even sell all the 2013 material on disc.
Each CD-ROM costs US$35 which ends up usually being cheaper than buying the PDFs individually.
http://www.farfuture.net/FFE-CDROMs.html