Most buyers are fearful about mold. If you are a seller, It would be in your best interest, no matter what state you reside in, to take care of the problem before putting the house on the market.
If you are a buyer and concerned about who is responsible, the truth of the matter is that 99% of mold is absolutely harmless.
What you want to find out is what is causing the humidity that is causing the mold and repair that. Is there a leak that is not evident?