super_ray47

Hello, I'm looking to buy my first air rifle and have been in contact with a lad selling a .22 cometa fenix 400, the gun looks good and the seller seems genuine so I'm going to test it out before I decide to buy it, just wondering, how do I tell if its in good condition and worth buying and what should I be looking out for? Also how much should I be paying for such a rifle in good condition? Thanks in advance for any advice.