Just did a quick exercise.
Parcel being sent from Sydney 2000 to Brisbane 4000
30x30x30 3kg.
Australia Post - $18. Couriers Please - $15.
Couriers please come to me. Australia Post I have to go to them.
You Decide.
Yep, I can send up to 25kg (cubed weight) for $7.50 + GST with fastway in sydney metro, pickup by 10am delivered by 4pm.
Auspost, 3kg express post satchel with no insurance, next day, $13 + GST, 5kg is $20 + GST. Parcel post satchels arent much cheaper.
Using our larger freight company, I can get a big server delivered from Sydney to Melbourne overnight for $35, fully insured.
Auspost lost business from my business years ago.