Buyers do need to have a financial cushion so that if the property appraises light they can make up the difference. That is the challenge I see here. If you have no additional savings or investments, you could have a serious problem and in danger of notcompleting your purchase. Example – final price $1.3 million. Buyer expecting to put down 20% = $260,000. But appraised price is $1.2 million. Buyer must put up $340,000 now.