I definitely take on this philosophy as well. Buy quality whenever you can as it will be cheaper in the long run. And many times a lot cheaper.
I spent ~$150 on a pair of Cabela work boots in 2011. They're still practically good as new with the exception of some small scuffs and stains.
I bought a Kelty backpack for ~$100 from REI some years ago. It lasted me for 7 or 8 years before it started breaking down (zippers breaking). Similarly, more recently I spent ~$130 on a backpack from Timbuk2 almost 2 years ago. It's taken quite a beating, and it's still holding strong.
To echo some others, I got an Apple MacBook Air in 2011. I speced it out as much as I could for the time, to try to "future proof" it as much as possible, and I'm using it to type out this response at this very moment. There are times when it's a bit slow, but it still works pretty well for what I need. Though I suspect it won't be supported with the next MacOS update, so perhaps I'll finally buy a new laptop then.
Lastly, I can't think of any particular brand names at the moment, but a good quality leather jacket will last you for decades if taken care of.