@engineer,
engineer wrote:
I think it's a lot more that a few hundred - replacing all the carpets for a start will be thousands. That said, if a smoker chooses to do that, who are we to say they can't or even to try to make it difficult?
It depends on how bad it is, perhaps painting will be required too, but new carpet and new paint is a normal cost of selling a house anyways. Also, the sellers could decide to not worry about it, to wait till a smoker comes along who wants the house. i think that the problem with houses that smell of smoke is much more that they take longer to sell than that they get a depressed price.
A few hundred and some elbow grease is all that is required to wash the place, clean the drapes and to do a baking soda treatment on the carpets, that should be enough for someone who has lightly smoked in their home.