Get your nic now, while it's cheap.
@Rossum has successfully proven nic, when frozen properly will last more or less your lifetime. Don't be the frog, slowly allowing your nic prices to rise, like a frog in a boiling pot of water, I hear frog is delicious but I don't want to end up a dead one.
Also you just never know what is going to change when. Some "understanding" docs aside, that "prescription" exemption was just put in place to not make Aus look like a giant jerk. Etc.
I am an ant, and I am not a big fan of grasshoppers.
Bottle your nic while ye may and all that.
Anna