Is it risky to leave the key with the intermediary when selling a house?

The advantages and disadvantages of selling second-hand houses and giving the keys to the intermediary are as follows:

Pro: If you give the key to the intermediary, it will be very convenient for the intermediary to show the house to the buyer. If the landlord doesn't have time to open the door, it may cause the house to sell for a long time. Therefore, people who really sell houses usually give the keys to the intermediary.

Disadvantages: although it is more convenient to show the key to the agent to see the house, if there are things at home, it is necessary to prevent the agent from tampering with the things at home. It is suggested to find a big agent and make a delivery list, which indicates all the things at home, including the figures of water and electricity meters.