In rec.aviation.student Kyler Laird wrote:
I learned that the FAA is now selling scanned sectional chart DVDs.
....
I've wanted the data for a long time too, so I decided to get it and
make it available to everyone.
http://aviationtoolbox.org/raw_data/FAA_sectionals/

*boggle* I'm not sure which is more shocking - that the FAA would sell
scanned sectionals at all or that somebody would put them up for free
download. THANK YOU!

If you are at all worried about the bandwidth, you might want to set
up BitTorrent on your server: http://bitconjurer.org/BitTorrent/

Regards,
Boris