... because they hope that after they tell you they can't get the ones in the add, you'll ask what they have that is similar then try and peddle those at a "deal" and still make a sale... I had a similar instance, except I went to the tire store after seeing a Clist add... they advertised my 35" Fierce Attitude M/T's for 150/ea, even told me they had them on the phone... but when I went to the store that same afternoon, the guy told me they had none in stock and would run 200/ea ordered to be there within the next two days... then he tried to pedal some Federal M/T's for the 150 price... I looked the the tires, said "No Thanks, I'll look elsewhere..." and left... I went to a local Good Guy's Tire Store and got them afterwards...