My first music pack. Does it make sense to do such large packs?

Hi! This is my first Ambient, Soundscapes music pack: http://audiojungle.net/item/ambient-soundscapes-pack/15423598
Included seven tracks, 27min, for a 68$. It is expensive? Does it make sense to do such large packs?

I think better to do 3-4 tracks

As I know, most authors do 2-3 version. I think 7 tracks it’s very large and expansive pack.