I have the chance to buy a 2015 superb 2.0 diesel business for £6200 from the leasing company when our rep who has had it from new hands it back next month. It has 98000 miles and i have never bought a car with this sort if mileage. Is this a good deal? Been driving it this weekend and have to say very impressed with it. What expenses am I likely to face in the next couple of years with it?

Is it manually or automatic gearbox? 

Big service for automatic is each 60 000km and bigger service for motor is at 210 000km if it is manual gearbox depending on driving but if it was driving on longer drives the clutch and flight wheel should be ok for 250/280000km.

I have a 2015 DSG estate and on 92,000 miles.  The only problem I have experienced is the rear shockers started leaking about 10K previously.  Provided it has been serviced correctly, with the DSG oil changed every 40K I cannot see any issues in the near future, 

It has a manual gearbox which feels like new. Services have been kept up to date by main dealer.

If well looked after, you can get 400/500k miles out of these engines.