Regardless of selling something "as is", meaning without any warranty express or implied, the seller of the article is obligated under the law to disclose all known matters concerning the article sold that may affect desirability or price paid by a willing buyer.If the dryer and washer were working at close of escrow and afterwards, and they stopped working after the buyers of the mobile home used them, you should not be responsible for any problems with them unless you knew something about these two appliances before close of escrow which were not disclosed to the sellers before the sale concluded.