7735 Porters Hill Lane, Lorton: "We listed it for $639,900 - very close to the list price of the exact same model home on the same street," said Ron Kowalski. "After two to three weeks on the market, we signed a contract, but then the deal fell through due to an appraisal nearly $20,000 under sales price. Within a week of re-listing the house, we received another offer and the appraisal came in over the sales price."