I live in Adelaide and phoned KCs in Melbourne . A guy called Josh answered with advice on whether to buy a new Yamaha Clavonova 501, 503 or 505, or second hand 305. He was well informed, patient, courteous and effective.
The prices were significantly better than all the stores in Adelaide and others in Melbourne. We ordered and paid for the 505 online and the unit was delivered within 5 days.
Everything was absolutely perfect.

Approximate cost: $4,600