Once: Secret Sydney 5 Star Relaxation Package - reverse auction @ Lastminute.com.au!
I'll put this in contests rather than in deals... as only 1 person can get it really. Lastminute.com.au have a "hammertime" deal - where the lowest unique bid wins a Secret Sydney 5 Star Relaxation Package. You obviously have to pay how much you bidded if you win - see the site for the full explanation of the T&Cs.
If you bid and lose, I don't think it costs you anything anyway.