Dear Sir/Madam, We are looking for a sensitive ELISA kits to detect low concentrations (below 5 pg/mL) of human GnRH from cell culture supernatants. We are interested in testing your kit (cat#E0843h) for this purpose. Do you have policy of offering free or reduced price samples for testing purposes? If this kit works well for us we would probably be ordering it in a frequent basis in the future. Thank you in advance,