Well done. Did you have the fuel filter done in the end (I take it yours is a petrol?)?
I was thinking plugs myself until I translated the service history it came with, and saw it had had them done about 10K kilometers ago in Japan. The owner had a coolant flush too the same date
Have you got any idea how much the underseal part cost, if you don't mind me asking? He did mine as mine was fresh import, but I was thinking about having it topped up say every other year going forward, so it'd be nice to know a ballpark figure? He might not have given a price breakdown granted, just gave a full sum to pay?