Volvo v70 Cross Country LPG

Hello, I have looked at a Volvo V70 T5 Cross Country AWD today and have torn a bit back and forth, because I don’t know how well I am. The vehicle was built in 1997 and converted to LPG, it has about 260,000km on the clock. It has probably been made a lot, quote from the advertisement: timing belt change including water pump, distribution gear resealed, while the -hülse-inspected and found very good. Oil change from engine, transmission and VTG, new exhaust and new cardan shaft medium bearing can be installed. In the (very short, about 10 minutes) test drive nothing occurred to me negatively, the engine runs absolutely pleasant and the gear switches buttery soft. Inside and outside the Volvo is fantastically maintained Now comes what makes me stutzig: When I asked what it is in the future, the seller told me that he has discovered that he is dripping a little bit of gear oil. I know that can probably have a thousand reasons, but should one better leave the finger?