Lumix fz 200 No problems here. Anyone else?

Below is a statement from an ad at a pawn shop selling a well cared for Lumix fz 200. I have used the fz 200 with results that have been most excellent in all lighting conditions closeup, mid and long range lens work. I've never noticed anything as made in this statement.

Has anyone noticed any of the following with the fz200?

This is a used PANASONIC LUMIX DMC-FZ200 DIGITAL CAMERA. Was tested and does functions well HOWEVER have some slight issues when shooting in Manual mode. Checked with our camera guy and was told "low light f2.8 push certain greens to yellow and some shots have yellow blotches... Picture quality in raw wide angle and setting iso limit max 400, Even at iso 100 produce lots of chroma noise and vignetting (dark corners) in every shot"