goddamn From memory it's 1k + to transport East coast to West though have no idea who through...wait til the WAers get on here and they will have a better idea.
Try CEVA Logistics (previously TNT) Toll VIP car carrying (although they 'subbie out' a lot to the above two) I've used Speedy car Carrying Meb to Bne, but not sure they do WA. I've used the top two recently and have a car I'm about to move out of Tassie to Brisbane, Toll were a few dollars cheaper.
trewin logistics Just used them recently for Qld to WA for $1.6k couldnt be happier with service, should be cheaper again for VIC to WA
Make sure the car is not below 13cm from the ground or the price will go up about $500 extra. Its costing me $740 to get my Z from NSW to Adel plus i had to get springs put in the front because it was 5cm off the ground.
CEVA seems to quote $1200ish for any car from syd->perth, regardless its a Colt or a Murcielago. But don't they also have issues with transporting cars with no roadworthy and rego?
2nded I used Autotrans and it cost me $1.5K for the car and another $500 for the front bar. Just fly over there, and come back with it on the train. No matter what courier u use, they throw it on the train anyway so you may as well do it yourself for cheeper. Thats how we're all getting back on the 2010 trip. Drive from WA across the country, then, throw our cars on the train and have a week long party for the return trip sweeeeeeet HOWEVER....my final advice, if you havn't paid for the car yet.. is DONT BUY IT lol be patient and wait for the right car to turn up in WA. I'll NEVER EVER EVER EVER buy interstate again. Ill buy from the UK before I buy interstate.