There is no one answer. Sort of like "How much is a sofa worth?"
10-100 USD or so
10-100 USD or so
10-100 usd
10-10000 USD depending on specifics
10-1000 USD depending on exactly what you have.
Could be anywhere from a couple dollars to several thousand. We need a lot better description to even make a guess.$10 to $10,000. Depends on the gun.
Which model are you referring to? State the model number and the condition of the gun, so and estimate can be given. Falke made 10 different air guns and rifles.
10-100 USD or so
10-100 USD or so
10-10000 USD depending on specifics
Without more infomation; price range of 10-10000 USD or so
There is no set price. Rifles and shotguns made before 1968 were not required to HAVE serial numbers. I have several dozen in my collection, and not having a SN does not add to the value. However, REMOVING a serial number from a gun is worth 10 years in prison.