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 ...
Videg games are all about DLC, sub fees, etc. It's not the 80s any more. The downside is that games are most costly if you want to play them to their full capacity. The upside is that content is added and bugs can be patched. In the old days, you'd buy a game and that was it....you lived with the bugs and you received the game in it's final state.