There was a post for this combo on Slick Deals for 79 dollars but it is backordered online.
I was strolling in my local HD in Pearland, TX and found this for 69.97. You basically pick up the 12 GAL Shop Vac and the Filter Set separately. They had PLENTY in stock.
Not sure if it is like this in other stores.
Edited to put YMMV and add Ridgid to title.
I should note that the combo from the online link is listed as sold out when I brickseeked my location. But the picture I posted was for the two separate items.
Store Locator [homedepot.com]