i think $7.99 is good, anything over the $10 mark and i would be looking at other options, and that is, accessing NAIPS through safari and the usual internet access, as i do now.. but for $7.99, then i will probably download it.
remember when selling something that has alternatives, then you cant afford to be overly optimistic about your pricing, especially when the alternative is perceived to be somewhat cheaper... what you are really selling is the convenience.