My favourite phone brands are Fairphone, Purism, and Pine64. All of them have removable batteries, headphone jacks, and SD card slots in their phones. All of them allow one to install one's own OS. Both Purism and Pine64 sell Linux phones, and Fairphone sells fair trade phones which are also very modular and fair to the user. Purism's Librem 5 includes hardware kill switches and even removable modem and WiFi/Bluetooth cards. Both the Librem 5 and Fairphone are designed to last as long as possible, and the Pinephone probably is too. And the both Librem 5 and Pinephone even have open source schematics.

I also love my Happy Hacking Keyboard Professional2, as it is very high quality and has a UNIX keyboard layout. It is one of the electronic products which I think is most likely to last my entire lifetime.

Another open source project of note is the MNT Reform, which is probably the most repairable and open source laptop available today.

I also dream of getting a libre Talos Secure Workstation some day, and have for a very long time. It is open source hardware and powerful too, a very rare combination.

The only one I have personal experience with is my Happy Hacking Keyboard Professional2. For my 18th birthday, I got a Librem 5, but despite it being my 19th birthday today, it has still not arrived yet because of many delays pushing the Evergreen batch further back. They are making lots of progress though!

Edit: Vitamix blenders are also very high quality from what I hear and from my own experience. I have only heard praise for them, and after this side of my family got one, I have found it is amazingly high quality and capable indeed (it can even make vegan milk and heat up soup!). In my opinion it is one of the nicest things in this apartment, along with my keyboard.

Oh! And I almost forgot! Very old Dell monitors are also very good! My two Dell 1907FPVs with a copyright date on their manual of 2006 are some of the oldest things I own and still work perfectly. Looking at their manual, their quality control is astounding:

Dell-branded monitors undergo exhaustive testing for performance, reliability, durability and compatibility with Dell systems. Under our H.A.L.T (Highly Accelerated Life Cycle Testing) regimen, Dell engineers push our monitors well past specified tolerance limits for heat, cold, vibration, shocks and drops, to ensure that they can withstand real-world conditions.

They even drop-tested the desktop monitor! Wow!

I have no idea how their new monitors are, but their old monitors ubiquitous on Craigslist are great.