Similar to this deal
Kings Meadows Bunnings have massively reduced the prices of a range of their Sandleford letterbox products.
Looks like it might be national.
Items aren't marked as reduced, shelf prices simply much lower for some items.
There is no obvious pattern; seems to be some colours of some styles.
The example given is $10 for the white version (not on website) vs $148.90 for the grey.
Various accessories such as posts also reduced.