You can buy it from various stores, just look around on Nexon's website. However, you do not have to buy it in order to get loads of nx quickly.
www.freenxcodes.com gives more nx faster. You can get 10k nx within an hour if you try. They require no personal information, although I suggest you make a gmail account as you will loaded with spam in your email. And best of all, they email you the nx card codes, so you dont have to wait for it in the mail. It normally takes up to a few hours to receive the code after redeeming it, which is faster than other sites.
Also, if you use this link http://www.freenxcodes.com?join=41099, you get a free hundred points when you sign up!
Hope this helped and good luck getting your free nx
NX
In maplestory 1,000 NX cash is worth 8,000,000 million mesos (this may not seem much, it is true)
Yes, you can get 25k NX
There is no such thing. Its a scam
like, 700 NX.
it cost 1.8k nx or $1.80
cash shop which is Nx cash
if you buy a nx cash card there will be a code in the back, and the code has to be activated to be in use and has to be scratched to see the code
No, you can't since they are legit keys.
you go to nx cahs shop and buy one it not might even be there any more -.-...
You get them from the cash shop with Nx or you can do a quest(all levels) at Amoria and you get a hair coupon.
You can get one Gachopon ticket for 1000Nx or two monster changers for 500Nx a piece