You can always buy raid flasks and stacks of infinite dust/raid gems etc.
On weekends, particularly Sunday evenings.

And then list them in smaller quantities throughout the week.

When I feel like playing the AH.
I buy 20-25 stacks of infinite dust, at close to or under 1g per dust.
And then list them 20 at a time, for close to the lowest priced dust (average 1g50s to 2g each) in stacks of 1.
Putting 20-40 up at a time, and relisting every few hours.
By the next Sunday, almost always I'm out of dust.
That is 15-20g profit per stack, 300-500g profit in a week for basically doing nothing.

Go to appraiser tab, and refresh the view on my dust.
Price towards the cheaper end of the 1's listings (I don't care if someone is selling stacks of 20's for less per dust).
Appraiser won't list more then "x" (usually set to 20) of the item at once.
Occasionally, if undercut, cancel auctions.
But mostly.. just update dust, and press Alt + Shift + Control and click the List button.