1) I don't see a problem in including normal maps in this pack
2) You could've used a 512x512 texture instead. 1024x1024 is too much unnecessary space
3) The models look quite plain, try drawing up some bumps in the texture, add more detail (to the model AND the texture), and you should be on your way

Too bad, I can't say a price for which you can sell a pack like this, but my personal view is that I wouldn't buy this pack at all in the state it is right now.