The filters and descalers are widely available online. The machine will require descaling and filter replacement at some point in the future depending on your local water quality an hardness.
I have found the Delonghi Manuals site and the link is. Please feel free to contact me should you require any further information or more detailed photos. The item "De Longhi Magnifica S Smart ECAM 250.33.
TB Bean to Cup Coffee Machine, Excellent" is in sale since Saturday, October 9, 2021. This item is in the category "Home, Furniture & DIY\Appliances\Coffee, Tea & Espresso Makers\Bean-to-Cup Coffee Machines". The seller is "ajrubicon" and is located in Cambridge. This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, Trinidad and tobago, Uruguay, Russian federation.