Well he's only repeated what is in the advert.
The front discs were replaced due to an MOT fail, they were an advisory on the previous test - as were the rear discs - but there's no mention of the rear discs being replaced.
The service history is a little strange, although the book stamp says 'Lexus Specialist', the Three Tuns Garage website makes no such claim, nor does their Facebook page. Perhaps they have a selection of them - 'Honda Specialist', 'Jaguar Specialist' and so on...As I say just a little 'odd'
Also, it's approaching 60K and the spark plugs haven't been changed. It won't suddenly stop working but if you want to look after the car then will you be able to do it yourself or find a garage who will do it for you.
Carzana values the car at £5.8k BUT that's the value for sale on a dealer forecourt and not as a private sale.