From memory, the Eibach sports (not the pro kit) were about £110, the Koni Sports dampers were about £350, the fitting and geometry including front camber+ toe-in, rear shims + camber etc and road testing work cost me about £375, so altogether I would say £850-£900 but worth every penny.
By the way all the work was done by a cliocup race car team and they were extremely impressed with the results. So am I.
HTH
Philip