Black paint around the edges of lens

[June L]

Hello,

i stumbled upon this lens while I was looking for a wide angle lens for my camera.
It's apparent that there is a quite amount of black paint gone around the lens edges.
Seller says this won't affect the quality of final image.

I searched the web, and found that the black paint is used to reduce internal reflection on lens.
With this much paint peeled off, I'm beginning to doubt seller's word.
But I've never used this kind of lens, so I want to hear from the experienced photographers on this forum.

Would the missing black paint on this lens have meaningful effect on the image quality, such as contrast, sharpness, etc...?
Also, I found on the web that you can just repaint it with sharpie. Could this be the cure? If so, I might as well just buy it becuase this lens is a little cheaper than other lenses.

Thank you.