The buyer should do enough research until they have a feel for the value in the market. I would never advise a buyer to pay more than a home is worth. However, if they want to make an offer for less than it is worth then they need to realize that if accepted they are getting a bargian. If they make a ridiculously low offer they might offend the seller and make it harder for them to get a bargian. Just like a seller who overprices at the start usually ends up with less, a buyer who starts to low usually ends up paying more.
Has HUD deposied your earnest money check? If not you probably do not have a contract. If they have then your 45 day period has probably already started. Check with your selling agent.
Normally the MLS system in your area has a section that the refrigerator is included or not . Washer and dryers are not normally considered "Real Property" and are not included.