I knew a guy who would buy a laptop, use it for like 3 months, then flip it on eBay and buy another. He said this is how you get good value for money -- flip it before it loses much of its resale value and buy new with the proceeds.

I'm not sure why people would do this. I use computer equipment to the point of exhaustion. I still have laptops from the 90s that work fine; while they will never be a main they are fun to play with. My main laptop currently is a ThinkPad from 2014 -- it does just about all that I need it to do without a hitch or stutter.

My main PC is a Ryzen desktop I bought in 2018. It's probably due for some upgrades, but I cannot afford them currently.