EDIT: It's a Sony 50mm f1.8

I found this lens for about $160. I’m buying it from a studio, and they say it’s barely been used. I have a basic knowledge of photography and lenses, and I just want a basic lens to shoot some videos. What do you think? What kind of things should I check on this lens?

Does anyone have a referral code that works in Portugal?
Thanks you

Tried looking and information on Reddit on adapting it onto Sony bodies is sparse. I know for $99 USD it won't be the tippy top quality glass but overall, has it been a solid lens for anyone who has used it onto a Sony? Looking to put it onto an a6400 so vignette shouldn't be a major issue for me.