couple of points Di..... most importantly, Australia Post is CLOSED on monday and tuesday..... holidays.

if you choose Calculated Postage

and put in the exact weight and dimensions of the parcel, when you look at the item it will show the postage to your postcode (if you are logged into eBay).

if I look it will show a different postage to Melbourne

and if Dave looks at the same item it will show different postage again, as he's in Canberra..

so.... although you, as the seller only see a cheap postage, people in Perth, Sydney, Darwin or where ever see a differnt  price to Their postcode