Did you try searching through a few of
these? Meh...most people lie on that - "99.99999% English Essay!!" and u read it and ur like 'wtf that was $#@% and looks like a year 10 wrote it and tried to pass it off as a year 12 essay'...I'll post some of stuff if you would elaborate on what kind of 'good essays' you want to see. I have good writing tasks that aren't necessarily essays that would be useful to guage your performance in assessment tasks off. On the other hand, I also have a few essays that I wrote in practice for the HSC however at the start of year 12 they may not be of much use as you are not to the stage of writing a band 6 HSC response. Similarly, you could ask your teacher for some past paper answers or something from the Standards Package.