I see Saffron deals posted somewhat regularly, typically priced just over $7 per gram - which is a good price and it's arguably better quality than this.
But this is Ozbargain, and this is by far the cheapest saffron I've seen at just under $6 per gram, plus it's available locally so no waiting for delivery if that's important to you.
As much as I like saving a buck, let me say this: I didn’t know what Saffron was before I started buying good one. The Aldi one (or any of the supermarket ones I tried) does not fall into the good category.
You’re better off not using Saffron in my mind than buying the cheap stuff. Or just spend the money and get good one - which is what I decided to do. The aroma and colour are worlds apart from the supermarket substitute.