Paslode Framing Gun Fuel Cells (Conara)

Give away. 8x Paslode Framing Gun Fuel Cells and nozzles which have never been used. Expiry dates on the bottom say 2016 and 2018 but I can't find ANY information to say that this is actual fact. There are no signs of leaking or deterioration, and if you test them gas comes out under pressure and smells normal. I don't need them so I don't want to keep storing them forever. All you have to do is pay the postage.