Would be glad to pay a bit more to ensure quality. My persistent fear when buying something is - if it fails, how do I get it serviced/replaced, or barring tha

Would be glad to pay a bit more to ensure quality. My persistent fear when buying something is - if it fails, how do I get it serviced/replaced, or barring that - how will I dispose of it. Because dumping it feels completely unsustainable. It's prevented me from buying to replace a lot of my stuff.