Good gun, especially with 32" bbls. Value is all about condition. Could be worth well over a grand if in super shape. Check the wear points, look down the bbls to make sure they are straight, measure the constriction so you know the chokes haven't been opened, and look closely at the wood for cracks. Also check that the rib isn't loose.
The first question I would ask is does the Citori have fixed chokes or choke tubes. You might be at a disadvantage shooting close targets with fixed chokes. I have been watching a few Citori's on auction sites. A good price in my mind would be less than $1,500 depending on the gun.
Fred, That is a Great Gun for what You are wanting to do with it. I have a '79 Model however mine is a Trap Combo with fixed chokes and the o/u BBLS are very versatile. These guns are extremely dependable and bullet proof. The only thing that has gone wrong with mine is the locking block wore out after awhile. If you can get it for $1500.00 or less You will be doing good. Keep it clean, and greased up and You will get many years of enjoyment out of it.