There was a few good discounts last week for Forza related Deals with Gold last week, some more this week. These are Microsoft Store prices, so full price is pretty high.
Requires Xbox Live Gold Subscription.
Forza Horizon 3 and Forza Motorsport 6 Bundle AU$108.32 (45% off)
Forza Motorsport 6 Platinum Edition Bundle AU$78.48 (it appears to include pretty much every pack available) (60% off)
Forza Horizon 2: Storm Island AU$6.74 (75% off)
Forza Motorsport 5: Racing Game of the Year Edition AU$17.49 (75% off)
Will check again next week.
Happy Driving.
Last weeks deals for reference
https://www.ozbargain.com.au/node/303994