On-line retail store services in the field of toner for use in printers and multifunction printing devices; on-line retail store services in the field of user replaceable supplies and consumables for use in printers and multifunction printing devices; retail services in relation to subscription-based orders of toner for use in printers and multifunction printing devices; retail services in relation to subscription-based orders of user replaceable supplies and consumables for use in printers and multifunction printing devices.