I wonder if the recent stock issues with the lack of 20kg HB lump was due to them getting ready to supply the 10kg lump?
There was a new display at the Hardware and General hardware store with the 10kg bags for $35.
Mitre 10 is selling the HB 10kg bag for $45 and BCF is selling a 9.5kg bag for $46.
I think the HB 20kg bag at Bunnies is now $55.