Jayo filaments have a Pay 6 Get 10 special (add 10 to cart) which stacks with the eBay 20% or 22% coupons.
Apparently a sub brand of Sunlu.
Filament looks to be using cardboard spools.
They use 1.1kg spools so it ends up being around $12.5/kg delivered for PLA (depending on colour) which is pretty cheap.
Nice, I bought some Sunlu last night appying the same codes to this deal https://www.ozbargain.com.au/node/807507#comment-14507089. Postage is $6 cheaper for me ($9 vs $15) on this deal, and the filament cost difference is about $9 on 20kg, so Sunlu $279.71 for 20kg of PETG (10 black, 5 white, 5 grey), this deal is $264.32. Ah well, no idea if there is any actual difference in the filament. This article seems to think Jayo is the better of the two… https://cybertechradar.com/comparing-jayo-and-sunlu-a-profes… Hmmmm, do I need more filament now? Actually, factoring in the 1.1kg per spool, that would be an extra 2kg, even better.