If you've been on the fence for picking up new DLC, be sure to check out the Complete the Set bundles during the sale. Each of the bundles offers a rare double-dip of discounts where you get the standard bundle discount and then the Steam Summer Sale discount on top of that. This often means that you'll get a bunch of essentially free products for the price of just a handful of them under normal circumstances.
On top of that *great* benefit, owning the complete set also grants you an ongoing bundle discount on all future additions to the bundle whenever you re-complete the set again.
Even if you already own some of the items in each bundle, you can get the fantastic discounts on just the remaining items from the bundle.
Here are the available bundles:
http://store.steampowered.com/bundle/488/Fantasy_Grounds_Deadlands_Reloaded_Bundle
http://store.steampowered.com/bundle/256/Fantasy_Grounds_DD_Complete_Bundle