I feel much the same, but sometimes a new product -- like the little A07 amp in my pictures above -- needs to be bought to fill a requirement. I can't believe how well this single-input amplifier with a volume knob does its job, at a size that fits so well on my desktop. I feel no need to replace it as long as it works and does the job I need it to do. It's an amazing bargain.
I like buying pre-owned audio gear and computers and vintage furniture, because I often like the older stuff better, many things are better made, and it can avoid new manufacture. My desk is about 57 years old, a very popular design built by Heywood-Wakefield from solid birch, and it still has the original finish. The oak chair is probably between 60 and 100 years old. The Gallo speakers were bought on eBay, and while the Micro satellites are still in production by Gallo Acoustics after its sale and move to the UK, the passive sub hasn't been produced since about 2008.
My MacBook Pro is a mid-2014 model, bought new and in service since then. I may need to get a new one soon, but it's still doing well. I have some Windows laptops from my employer, and those last about 4-5 years in service.