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 find it comical how limited the content is in stuff packs. There is not enough things in a stuff pack to be worth $10. I feel like they were after thoughts from expansion packs or something and they thought they could make a quick buck on selling the few items as a "stuff pack".