not necessarily true. when i bought my home the inspection found loads of mold in the attic (kitchen stove vent and bathroom exhaust vent both just went into the attic, which was a hip roof without any soffit venta and only a ridge vent that was about 1/2 of the width of the house). brought in a remediation company who estimated $5k for repairs. i countered my offer by $5k less -or- having the seller make the repairs. seller gladly took $5k off the price, so in my example with real world real estate experience as a home owner, home seller and appraiser the discount was the exact amount of the repair required. if i had lowered my offer by more, say $7k or $10k, the deal would not have completed.