If you missed this over on the Frog God Games website or Tenkar's Tavern, there is a nice PDF package sale for Swords & Wizardry going on.
There are three tiers:
Tier 1 is $1 and includes Swords & Wizardry Complete Rulebook, Bill Webb's Book of Dirty Tricks, The Black Monastery, Quests of Doom, Cults of the Sundered Kingdoms, Grimmsgate.
Tier 2 is $8 and includes all of Tier 1 plus Rappan Athuk, Against Tsathogga, Cyclopean Deeps 1-2, 1975.
Tier 3 is $15 and includes all of Tier 2 plus Mother of All Treasure Tables, Splinters of Faith 1-10.
Personally I went for the sweet spot of Tier 2 - all the stuff I'd really like to read is in tier 1 and 2. Even with all of the duplicates 0 I own a lot of these, some in print and in PDF, Tier 2 was worth it just for a PDF of Rappan Athuk and the two Cyclopean Deeps books.
Hopefully besides just reading them for enjoyment I'll get some useful bits I can steal for my GURPS Dungeon Fantasy game. It's a good deal if you like Swords & Wizardry and even the first tier is worth it even if you're only curious about Swords & Wizardry.