I can’t tell all the specific products, but here is what I have and what you can spend money on:
First of all, I do work from home in 4/5 days. This is why I do have some freedom what I use. I just partially have to buy it for myself then.
It starts with proper ergonomic chair, I think I spend 600 € on my own home-office chair. In office my chair is around 1000 € (don’t know if its really worth it). In office I do have electrical desk, so that I can work while standing. My desk at home is wooden desk I made myself. Lots of plants, paintings, sitting in my winter-garden with lots of natural light. In winter you can easily get depressed, if you sit at home alone. I do also use day-lighting with a good lamp. The lighting alone can costs you 100-300 €. I do believe in the importance of well designed office (my company does not). I also created multiple spots for working at home, so that I can switch locations.
I use good mechanical keyboard with a good wrist rest.
I use the Cherry MX 3 with custom Keycaps (~120 €) In Germany you can spend more than 400 € on good mechanical keyboards, but this is due to market and the German Iso layout.
I don’t like ergonomic mouses, but I do use a compromise where my hand is at least tilted around 30 degrees using the Logitech MX Master 3s. I do reduce the usage of the mouse as much as possible. I develop software, if you do CAD work, then this is another thing.
I use a big screen as often as possible, so I do have docking station and larger external monitor. I prefer ultra-wide over multiple screens. I believe too much screen is not good either. You need to enjoy your environment.
I do sport and care about my food. I frequently pause my work and have a short walk, I do prevent working over-time and I reduce the time on screen during my free-time. Depending on what you do, you can spend a lot of money on life
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I do prefer cables, but I use blue-tooth in certain situation. I don’t think that radiation is big problem, but if a headset device is directly located near you head and you do a lot of web conferences, I would definitely care about buying a quality headset with cables, because its no so clear if its 100 % safe on a longer term.
I try to maintain a minimal non-digital work-life as often as possible. Meaning I do sometimes buy and read books instead of googling everything for work. It might be slower, but you get a different picture.
I organise certain meetings within a cafe and frequently meet with colleagues in the city for reviewing work. Any device which helps you working mobile can help. This includes a proper mobile, and software for anything which minimise non-productive overhead.