What is the value of a browning citori serial number 06478pz163?

Citori shotguns have become the "bread and butter" in Brownings lineup. Originally, the Citori Over/Under was an economical choice over the quality Superposed Models. Since it's introduction in 1973, the Citoris have been made in over a hundred variations. Your model is a Citori 20ga 3" Grade I, made in 1981. Citori's are now very collectable when in top condition. Values have a wide range due to so many variations and grades of the Citori and other Browning Over/Unders. Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Recommend taking it to a gun shop for appraisal. You can also do your own investigation by looking at other models being sold that are in the same condition as yours. Try the gunbroker.com or a periodical called "The Gun List" You can also reference the Blue Book of Gun Values which can be purchased on line at various retailers.