How to find a good seller's real estate agent

[Leo Kotschenreuther]

The forum is full of posts about finding buyer's real estate agents and how to determine that they are good at working with investors. These are good at finding you great deals to buy.

Now my question is, how do you find a great seller's real estate agent? If you already had a great relationship with an agent then you would likely use that agent but what if not? What qualities would you be looking for in the agent? How would you interview the agent and what questions would you ask?