I would agree. It is always a good time to sell, but everybody is different.
First. You need to look at the reason why you want to sell... I.E. Need to upgrade, downgrade, need to move for a job, etc
Second. Do you have equity in your current place? or do you need to come to closing with money? This can be hard as values are lower then they have been during the early 2000's.
Third. Do you plan to buy a new home as well? This is key. If you are selling at a lose you can make up the loss by buying at a discount.
There are many factor in selling and when is a "good" time is different for everybody. You need to look at where you are and where you would like to be to determine if today is a good time for you.
Feel free to contact me with any questions.