Not a huge selection to choose from, but seems like decent filament (looks identical to the discounted dual colour Silk PLA on Siddament, which has excellent reviews).
There's also metallic silver PETG for $14 - no idea if it contains any metallic particles or if it's just the colour, but it's a little cheaper than most other stores for plain PETG.
I've never heard of koalafilaments before, but I'll be honest, they don't look particularly reputable. The ABN was registered about 18 months ago, along with another site (enigmaforge) which sells a handful of prints, that from a quick search seem to be models licensed under CC-BY or CC-SA, and that site doesn't give any attribution to the model creators. If anyone can share any additional information about the filament store, please let us know in the comments.
I think i'll stick with JAYO