The weeklong sale from DC is disappointing in that it's only a handful of collections, and pretty much all of them were on sale in singles form recently. The only new to sale-dom books are a few of the older Green Arrow books.
https://www.comixology.com/Green-Arr...Sale/page/8349
Another Top Shelf sale, also ending 10/12/15, has 23 very good collections and an amazing bargain bundle.
https://www.comixology.com/Top-Shelf-Sale/page/8354
I particularly recommend the Motorcycle Samurai bundle. Only $3.99 and what I've read so far is amazing. Two freebies are in that bundle, so check them out if you need convincing.
https://www.comixology.com/Motorcycl...rai/bundle/773