Errr…excuse me…but if a vendor wants/needs to sell surely it is in their best interest to have the property at a realistic price to compete with the rest of the market.
If you were on the market and the agent just left you in the dark as to market conditions (knowing that you were over-priced) would you be grateful to him/her – I think not.
Agents do not create or influence (greatly) market conditions – they merely react to them.
As for your daughter – very sensible. Don’t tell an agent a price and get three valuations at least. Question them as to how they are going to sell and appoint the one you feel happiest with.