only a limited number of shops in saddar have air guns. i went to pretty much all of them. the guy offering the most reasonable rates was Shaheen Traders (small little shop. ask anyone there, they will know about it). He had Gamo Delta, Gamo Shadow 1000, Gamo Shadow 850, and 3 Diana's. Prices start from 8500 rs and go up to 35000 rs (before bargaining).