I'm asking what the scratches are, if you can't answer then why reply?
Really? You are asking us, your fellow end users, to determine the nature and cause of the scratching from a picture without being able to physically inspect the device.
We have told you all we can in this remote setting. Not sure what more you can expect given we are not Apple employees and only have a picture.
That said, the pattern of the scratches (short, random strokes) suggests to me that someone repeatedly used a hard-tipped pointer to show others something displayed on the screen. That permanently damages the thin, anti-glare coating. If the original owner were that careless with an expensive computer's screen......
The only fix for damaged anti-glare coating is a new display. If this is a Retina Macbook Pro, that requires a entire new assembly that, depending on screen size, can set you back US$500-650 in the U.S. based on other user reports here. That assumes it is not too old for Apple to service:
Obtaining service for your Apple product after an expired warranty - Apple Support
Others recommended reporting it to eBay for a return. I concur.
If you really want an in-person eval, have Apple examine it:
Genius Bar Reservation and Apple Support Options - Apple
We can do more more here.