Hi Gatherer and welcome to the forum. A few questions, how old and in what condition is the gun. What scope is it and what size is the air tank, also is the tank still in a valid test period.
Another thing you might ask yourself is do I want a .22 and what are you going to be using the gun for. If it's just for hunting then it's probably not a bad rifle. If you want to take up HFT or FT then personally I'd advise you to look at something else.
Finally have the gun chrono'd because if it's delivering over 12 ft lbs then you'll need a firearms certificate to own it, unless of course you like the idea of free board & lodgings for a while.
Hope that helps