They're at least $1 each from AliExpress/eBay so ~$2.20 for 5 of them is a good deal I think. Normal price is $8.66 (~AUD 11.47).
Credit to PriceHipster.
Package Component:
1 x Blush Brush(Toothbrush Shape)
1 x Foundation Brush(Toothbrush Shape)
1 x Eyeliner Brush(Toothbrush Shape)
1 x Sponge Blender(Water Drop Shape)
1 x Brush Egg(Magic Makeup Brush Cleaner)
Category: Makeup Brushes Set
Brush Hair Material: Nylon
Package Contents: 3 x Brushes (Pcs) 1 x Beauty Blender 1 x Brush Egg
Thanks, will give this a go. Even if the quality isn't great, I've been meaning to buy a brush egg so for $2.20 with some extras, this isn't too bad.