2000 Honda Accord airbag

Interior problem
2000 Honda Accord 6 cyl Front Wheel Drive Automatic

what is nessary to fix airbag after it is deployed on a 2000 honda acord coup v6 what parts do I need to get I am asking because I want to know if the tec is just saying stuff that I need to pay for or he is scaming me it was a low speed accident and only the driver side side airbag went off they are saying that they need to replace all the seats even one nothing happen to new steering wheel and new module I paid 7 grand for the car they want me to pay 5 grand I would just want to know what goes to in fix airbag. And a ball park guesstimate of how much it would cost.