I just sold my vita to a person in penang just now, and he claim that he is working in a maintainance department which is lcd panel related

He claim that my vita bottom 2000 screen has minor darken spot and say my vita screen is dying while tekan my selling price.

I wish to know more about this, as i know old vita 1000 model has the mura or darken issue due to oled screen being organic.

But my vita 2000 is using lcd/led. I know that i kept my vita off for quite a long time which is around 1 year or more. Will this cause my vita screen to be dying as the person buying my vita is claiming?

Would like to know more about this from vita owner. Just to make sure im not being lead into false information as its fishy as hell.

PS : if not mistaken my screen was like that since the beginning i brought it. I cannot be sure as its frigging long like 3 years i own the vita.