What really should be posted to ROFR.net is what is the price sent to the developer. In a lot of cases, the closing agent may include closing costs in this amount. This is often true of Ebay sales. Some people may not know the actual amount that is sent. Overall, ROFR.net is just made up of people self reporting amounts and will never be 100% accurate. Over time it can help provide an overall idea of what weeks may be passing or failing at. If the closing costs are not a huge ratio to the total purchase price, then the difference is probably immaterial.