I finally decided to make a brokerage account and checked some old promo codes. Fortunately this one worked, not sure when it expires though.
$1,000 free brokerage, valid for 90 days, across domestic and international shares, mFunds, ETFs and Warrants. FX rates for international trades still apply.
Its a good deal but IIRC doesn't NAB Trade not allow users to transfer their CHESS holding bought via NAB to other brokers? Which IMHO should be illegal as they're your holdings but I believe thats something they do. Makes selling via another cheaper broker very hard to do.