Hi, so I'm looking at buying a citreon Berlingo 2010 van for work that's has done 81k miles but the only concern I have the owner has told me it has a slight oil leak but isn't major and has in the past came back with a 'oil leak but not excessive (8.4.1 (a) (i))' on the mot. Can someone be kind enough to make me aware of the worst case scenario of what I could have to potentially pay MAXIMUM to have it sorted where ever it could be coming from? Many thanks