At this point of tike there is 14 stuff packs, each cost 10$ that would 140$ for stuff packs compilation and you would hardly get enough content to expand on the base game and keep you interested for ...
I don't mind the stuff packs. I think you get a good amount of content for ten dollars. I do have a problem with stuff packs being used to finish off an expansion pack. The upcoming stuff pack feels like it is adding stuff that should have gone in the expansion.