So my wife and I want to sell our home but before we put in on the market our basement needs some work. We have had some moisture problems mainly because the windows need to be replaced. How do I go about removing the stains and or black mold? Is it black mold? I have had about 12 people coming and give me estimates and all 12 people have given me different recommendations. Some recommended sealing before dry locking, otherwise in 4 days the basement would look the same. Is it as simple as scrubbing and painting because their estimates have ranged from 400-$1300. Looking for any help! Thank you!