1. A computer system for rating a plurality of tax liens of real properties from a plurality of county government computing systems, each of said plurality of county government computing systems having at least one county database containing county tax lien information relating to each of said plurality of tax liens of each real property in a county, each county government computing system being accessible over a network, comprising: at least one computer connected to the network and adapted to communicate with the plurality of county government computing systems to receive the county tax lien information including each of said plurality of tax liens, the computer determining one or more ratings of each of said plurality of tax liens; and at least one database connected with the at least one computer, the at least one database configured to store each of said one or more ratings associated with each of said plurality of tax liens; wherein the one or more ratings of each of said plurality of tax liens is accessible from the at least one database over the network to one or more third party computers.