I take great care of my electronics so you don't have to worry about stuff that you can't see. I never dropped the laptop or left it in extreme environmental conditions for example.

It has the base CPU which is an Intel Core i5-5257U - 2.7 ghz - dual core.

There is a scrape near the corner of the top left side of the monitor on the aluminum. I've included a picture. It's small.

There is a very faint line across the middle of the screen from when the top case was bulging due to an expanding battery. I've never noticed it with the screen on.

The battery was expanding and had to be replaced by Apple in October 2018. The top case was replaced at that time as well.

I had a screenshot of Coconut Battery, but I lost it. I'd have to set up Big Sur again to get that info. If it's important to you, I will do it.

I believe it has 87% battery health and ~160 battery cycles. Of course, human memory can be faulty so I'd say just view it as a slightly older than 2-year battery.

The charger has tape on one side to block the light.

Trackpad and keys have some oily smudges which can be seen from an angle. You can see from the pictures that they look clean head on though. I don't believe that oily-ness can be avoided over time.