Provided are radiolytically and metabolically stable metal complexes based on tetrathiol ligands useful for nuclear medical diagnostics and in endoradionuclide therapy. The printer apparatus can perform a flush operation to delete the print request and the data associated with the print request in accordance with various terminate conditions. Methods of preparation and methods of use of the peptide-polysaccharide complex are provided. For future uses of the first party’s financial account to transfer funds to andor from the first party’s financial account, the first party’s financial account information need not be entered again with the payment service.