Old thinkpads have usually bad display and bad battery life. Maybe if you replace half components it is decent machine, but I would rather use something like this.
You would rather use the Walmart machine? Its battery life is worse and it doesn't actually work. The real question is what's better for the price point (and a used thinkpad is orders of magnitude better), not whether things that are better exist.
I had really bad luck with Thinkpad motherboards, I dont think quality matches the hype.
The battery is trivial to replace and there are models with proper screens.
They are still not as vibrant as those on multi media notebooks, but if you don’t do image editing they are good enough.