What country/geographic region are you in? I have Canada and US specific sites about what sites and stores are good, what are overpriced.
You should be able to get Linux running on most laptops, whether every feature will work (camera, fingerprint sensor, audio, dedicated video card) can be a crapshoot but I've heard it's gotten better on the software side in recent years, just use Ventoy and distrohop until you find one that works. Trying to use a Nvidia laptop graphics card is a huge pain in the ass, I'll warn you in advance.
Old ThinkPads are a solid choice if you can scrounge one wherever you are.