I am regular user of both the forums i earn NB$ as well as NP$ currently i have around 150 NP$ which by my usual exchange rate is = 150 * 0.018 = 2.7 USD
2.7 USD in NB$ exchange critarie goes on to be 2.7 *(1000/6) = 450 NB$
if anyone willing to exchange fully or partial do contact me via PM.
If you wish to purchase NP$ from USD you can get that deal too.
Note : i hope this post is not against the rules of NB.