Tiger has a sale on where you pay $1 for the return leg.
Eg:
Sydney to Coffs Harbour $69.99, Come back for $1
Sydney to Melbourne $83.95, come back for $1
Melbourne to Hobart $69.95, come back for $1
For more deals like this, follow us at https://www.facebook.com/beatthatflight or at our site https://www.beatthatflight.com.au
For those who got the Amex offer of spend $100 get $30 back, it expires tomorrow.
https://www.ozbargain.com.au/node/390035
The Melb -> routes look like they're pretty much limited to 12 Feb - 4 April (a few are a day either side)