Dark Horse Digital has some free Star Wars comic bundles available, seem to be a combo Free Comic Book Day (5/3/2014) & Star Wars Day (5/4/2014) promo.
They also have some other free comics under the "free" menu item, but they're mostly teasers or special intro volumes. Scratch that, I didn't look closely enough at first. The first page is rather barren, but has some free comic book day freebies, the second page has a bunch of Falling Skies free issues and more free comic book day freebies. So check the list out. Annoyingly you have to click on "Read Now" and load the book to "buy" the individual free issues. There's some Star Wars free comic book day freebies on page two.
In the not-free front, they have a huge
Star Wars May the 4th Megabundle with 151 Star Wars comics for $100. List price is $467.50, so this is a huge savings.