But with the red satchells - they are a specific pre-paid service, Would have thought they would have an indefinite lifespan even though those satchells are no longer available - OR - Australia Post should be prepared to buy them back. Haven't seen a notice for either yet.

I was in the Aust Post shop in Mildura just this morning and they had plenty of the red/white ones available for sale right beside the 'parcel post plus' red/white/blue ones (in 500g and 3kg sizes)