This is an unusual deal: from now until the end of the weekend, Harvey Norman is offering a second free laptop when you buy selected models. The main catch? Only AMD-based machines are included.
The conditions state that the second laptop needs to be of equal or lesser value, so you don't have to buy two of the same model (though that might be what you're after). There's a lot of ASUS models on offer, plus Acer, HP, Sony and Toshiba. Stocks are likely to vary a lot between stores, so you might have to do some schlepping around to get the exact models you want.