It really varies in my city a preschool room varies from £34 to £74, dependant on the setting.
I must admit the service is reflective of the price.
Whilst I had no particular issues with the nursery I was paying £34 a day for, the building was tired, the staff where all really young (fresh out of college) and badly paid (which I think contributed to lots of sickness and absence, poor attrition)
However there was 1-2 really passionate members of staff that stuck, and kind of made up for the others.
The fancy preschool (we moved) is amazing, the starting salary for staff is about 2/3k above average and the resources available within the preschool are brilliant. Including resources to make the practitioners jobs easier.
If I had to select a nursery in the future I will definitely be going more on staff (salary, qualifications, attrition etc) and then resources second, and price last.
I would happily pay more for happy well motivated staff in a nursery any day, they are what makes the place successful on reality!