In some circumstances both parties may agree to appoint a single expert (a certified practicing valuer registered by the Australian Property Institute) to act on their behalf, in which case the cost is usually shared.
The benefits of having a single expert are a reduced cost, as it is typically shared and the value provided is accepted by the Court as evidence.
On the other hand, each party may independently appoint a valuer to act exclusively for them. In this case each party will need to apply to the Court to accept the evidence given by their valuer. This approach is likely to be more costly and potentially a longer process to reach agreement.