I have the same shotgun. For 650 you should get a gun in great shape with all 5 chokes. I paid 400 for the same gun. Mine is in great shape but only has a modified choke and I got a great deal from a good hunting buddy. If you buy it you will love it.

Edit- I have the 26 inch barrel and it fits great and is easy to shoulder.
It will be fine for ducks. I plan to shoot mine for geese all year next year.
It may be the easiest semi-auto gun to clean on the market. (very important to me)