I am considering buying a used Toyota Camry. From my general (amateur) inspection all looks ok but the only thing I noticed was what looks like some residue or possibly liquid overflow around the coolant reservoir. Below is a picture:
I have found some info online but it mostly talks about oil in the coolant which I am not sure is related to what I observe here. So the main question is whether that's something I should be worried about and can indicate some serious issues?