Goldstar Software sells the line of data replication products from Carbonite (formerly called Double-Take, Vision Solutions, and NSI), because these products have been tested to work perfectly with the PSQL database engine that we support.  However, the pricing of the data replication solution is determined by many factors, such as the machine type, the OS edition, the type of protection you need, and more.  Please contact us to discuss your exact needs, and we will be happy to send you a formal quote!