An agent can be an expert but it doesn't mean that he/she is the one for you. It all depends on your personality and theirs, your time schedule and theirs, are they too busy or will they give you time, do you click? It's essential to feel a connection.
If you're looking to buy, you want an agent who understands your needs, desires, wants. Someone who clearly identifies your goals and who will work with you to achieve them.
If you're going to sell, what are your reasons? what is your time frame? what is your financial objective? ...
The best thing is to schedule meetings/consultations with two or three agents (I don't suggest more as it becomes overwhelming). Ask them about their marketing strategy, the tools they will use to advertise your property and what are the benefits of working with them.
Once you sign a buyer-broker agreement, or a listing agreement, you board a journey where communication will be imperatively essential and critical. And you will work in partnership, towards one goal: making your real estate investment a successful achievement.
This is my recommendation. If you're interesting in a consultation with me, please let me know so we can arrange something at your convenience.
Have a great day