Roughly around 9.79 (excl PayPal 2.5% currency charge)
Still looking for a Don't Starve copy for a low price? Here you go. Don't Starve shows many similarities with MineCraft.
Portal 2 is on sale once again at 66% off in case you missed it last week during Steam's Midweek Madness sale/deal. *(http://www.ozbargain.com.au/node/69650)*
**Sale ends 3AM Tuesday (AEST)**
Total War Napoleon The Imperial Edition $4.99 (Steamworks)
Sid Meier's Civilization V $7.49 (Steamworks)
..and many more strategy games on the site on sale.