Found this while googling for full duplex scanners. Brother are doing a cash back promotion.
For a limited time purchase selected Brother products and receive up to $300 Cash Back*.
Offer available from 1st May 2015 to 31st July 2015 on selected MFCs, Printers & Scanners.
ELIGIBLE PRODUCTS & CASH BACK AMOUNTS
MODEL CASH BACK AMOUNT
LASER MFC-8950DW $300
MFC-L9550CDW $200
MFC-8910DW $100
MFC-L8600CDW $100
HL-L9200CDW $100
HL-L8350CDW $100
HL-L8250CDN $100
HL-6180DW $100
MFC-8510DN $50
DCP-8155DN $50
HL-5470DW $50
HL-5450DN $50
HL-5440D $50
INKJET MFC-J6920DW $100
MFC-J5720DW $50
DCP-J4120DW ~ $50
MFC-J4620DW $50
MFC-J870DW $50
SCANNER ADS-2600We $100
ADS-2100e $50
~ The DCP-J4120DW is a Harvey Norman exclusive model
IMPORTANT:
Claims must be made online by 8th August 2015 and supporting documents must be received by no later than 31st August 2015.
Officeworks is a non-participating reseller
Separate claims must be registered for each product purchased
Terms & Conditions apply. Click here to see Full Terms and Conditions
I think they have these every 6 months. Good for those who need a priter.