You need to;
1) Confirm that Music123 are free to export Ibanez products o/seas, specifically to Aust., as many US dealers are restricted by manufacturers as to where they can sell.
2) If they are clear to sell to Aust., then find out what shipping "company" and/or method they use. It is possible, that a guitar exceeds the size/weight restrictions for parcels which would normally be sent through the USPS Air Parcel Service. (NOTE: I said USPS NOT UPS) meaning it could be sent "economy" or surface mail which takes weeekkss. The alternatives to the postal services are Fedex, (God forbid....UPS) and DHL.
My advice to anyone wanting to import instruments into Aust., is to use DHL, you do pay a premium BUT normally, the goods are on the ground in Sydney within 24 hours of being despatched in the US, ie: the less time in transit = less chance of either damage or disappearance. For smaller items, (studio gear, etc.) I only ever use the USPS Global Express Mail service which takes between 5 - 10 working days.
The basic costing is calculated like this example.......:
Items cost ($380US) approx: $505AU
Duty 5% ...........................$ 25
Shipping....($80US) approx: $105AU
Sub Total....( VOTI )............$635AU
GST 10%...........................$ 63.50
TOTAL ..............................$698.50
Now as I said, my shipping preference for guitars is DHL, however with them, you can usually expect to pay well in excess of $200AU for shipping and in the past I have allowed approx., $500AU on top of the actual instrument cost to safely cover shipping, import costs, etc. Also, consider that as a timber product, a guitar is usually inspected (albiet briefly) by Quarantine which can carry an additional smallish fee.
From experience, I have found that some brands of guitar aren't worth the effort to import, eg: Fender, as under normal circumstances, the Aust., pricing both new and s/hand doesn't allow for sufficient saving to warrant the exercise.......could explain why I stuck to importing Gibsons, although even they have become a less attractive option.
I probably should add that it's not wise to take too much notice of cranky old farts from West Aust.,...........they have been displaying that temperament ever since they realised they were on the wrong side of the country
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Armi,
Good to see you back in the country mate.....you back into songwriting yet?