I've noticed in the Linux community whenever someone asks for a recommendation on a laptop that runs Linux the answer is always "Get a Thinkpad" yet Lenovo doesn't seem to be a big Linux contributor or ally. There's also at least six Linux/FOSS-oriented computer manufacturers now:
So what gives? Why the love for a primarily Windows-oriented laptop when there are better alternatives?
I usually grab a 3-4 year old Thinkpad every year or so for anywhere from free to 300 bucks. I pick them up from old corporate liquidation lots. Usually grab one that is a little dirty or beat up and then just clean it up and install my own SSD and upgrade ram from my stockpile.
I like some of the others on that list, but with how cheaply and easily I can get a Thinkpad, I just can't be bothered to spend more. I use my laptop mainly for code, and I do a lot of low-level programming so performance is usually way more than enough. The programs I write are extremely small and very efficient. Any processor from the last 20+ years will run what I am usually working on.
When I want to spend big bucks on a computer, I put that money towards my desktop where I do more gaming and some digital artwork.
Where do you buy them from?
I usually look for corporate office liquidations in the paper or on social media. Other than that, I stop into colleges and businesses and ask them if they have hardware they need to recycle. Companies usually pay for recycling, so sometimes they will just give you stuff to lower their recycling cost.
And lastly, ebay if all else fails.