Stack with 8% cashback on Xbox gift cards from ShopBack.
If you collect Microsoft Rewards points you can stack again by redeeming Xbox/Microsoft gift cards (which have better exchange rates compared to Amazon, Coles etc.).
Black with cable for $79.95.
Black with wireless adapter for $89.95.
Edit: Xbox GCs are 8% now, they used to be 10%.
Is it just me, or does the Xbox Gift cards (with short 90 day expiries) on Bing Rewards cannot be spent on these controllers?