Hi, I am looking for some advice on a BSA Meteor .22 Air Rifle which I have not used for at least 30 years. It looks in good condition at least externally to me except for the rubber seal where the barrel breaks looks corroded.

Unfortunately I have no place to use it any more and I don't see this changing any time soon so I was thinking about selling it but I have no idea what to price it at. Also as I cannot try it out I don't know what condition the spring mechanism is like or how these age.

I would appreciate any advice anyone has with experience of these things. Thanks in advance for any help.