I love sheet masks. Unfortunately, it's an expensive habit I've developed for something a one time use item. They're fantastic for nourishment and for giving your skin a bit of pampering throughout the week. I used to think that $3 a sheet is a pretty good deal and the most I've paid for one mask is $4.50 (The Face Face Vita C Gel Mask).
Personally, I would not pay for more than $1.50 a sheet mask anymore, and you can easily find good deals around Sydney. Here are the masks I used last year (and some quick thoughts):
Missha:
My very first sheet masks of 2013! I decided to venture out and try them in around February. Missha has since closed down in the QVB.