Overspray is an indication of a repair, and it's not in a particularly desirable area either. Depending on their definition of "bubbled paint", that could also indicate a poor quality repair - would need to see a picture of it. Colour variation between panels (like the panels are a solid shade different than the one next to it) is also an indication that there could be damage underneath that's just been covered up with the same coloured panels from another car.
Oil seepage is common with age, usually the rocker cover gaskets will start leaking oil down the sides and front of the block. It's a cheap and common fix, they fail eventually on all cars.