NSW Custom Number plate sale.

[HULK EF]

I have a black letter on a sunflower back ground number plate. No Numbers only letters.. "FRINEM" Just last week payed the rip ff $440 Per year fee to display. damn NSW RTA.
Should i decide to sell the plates what happens to the $440 allready payed?
Is it free payment for the buyer? kind of like rego on a car? or do the RTA refund you the average of how many days left so kind of like working out $1.25 per day X however many days left until next yearly payemnt = your refund?

Any Help would be appreciated.