I have an early model here in 22 cal which I inherited from the owner when he died four years ago. I doubt if he filled it more than twice, he just liked owning air rifles. I guess I have cocked it and fired it less than ten times in four years, and I must be one of the lucky ones as it's still holding the same air.
I can't see me ever using it so it will be up for sale sooner or later.