How Long Will My PSP 3000 Last As It's Lifespan?

The screen is showing a bit of dark green from the corners only with specific colors like darker shades of gray and lighter black shades and thats pretty much due to it being stored away for 12 years, the UMD Drive is dry (I would either grease it or not use it), and then the battery has expanded (which I've disposed of) causing the back door to break off and crack. I've gotten replacement parts for the door and the battery.