Purchasing question

What you can do is, put NX on another account and gift the package to a mule in the same server and account as your main. So just stay out of the cash shop from your mule, and when you do decide to get it, it will be accessible from all characters of that account.

Gifting it to a mule won't help. My friend gifted/bought a friendship ring for my mage. I logged on priest to transfer NX clothes & I can still receive the friendship ring on priest. :X