I mean, the comparison isn't quite Apples to Apples, but I've spent $12US on a single hairstyle for use in Daz Studio. Yes, it's for art rather than a game, has higher quality textures, higher poly mesh, and includes morphs - but on a straight quantity count, I've spent more for far less.
So it all will depend on if I want the content and if I think there's enough in quantity, quality, and usability to justify my spending whatever the price ultimately is.
For example, I don't care how cute the Dust Bunnies are, I'm not getting the Bust the Dust pack, because I don't care to add vacuuming to my game. Even if it's the best darn vacuuming gameplay ever because Bust the Dust fails on Usability for me. Other people are more likely to find it useful, and more power to them and may they enjoy every sim day of it.