As for the pricing, I wish they were cheaper too. But for me, I don't think this grouping was worth the money more because the themes didn't really interest me that much as opposed to the actual content's value.
I'll probably only get the Kits if they (on the off chance) go on sale, I win them from a giveaway, or I have everything else and they're all that I'm missing.
If it's a theme I'm interested in however, I have no issues paying $5. I spend more than that on a single coffee at Starbucks (because I get specialty drinks with a few customizations) so why wouldn't I spend that on a Kit I like the theme of.