The average cost for a new double decker bus can range anywhere from $500,000 to $1.5 million. This price range includes the cost of the bus itself, as well as any additional features or customization options that may be included.
Other double-deckers have come along since and red double-decker buses will likely remain a staple of London public transportation as long as London exists, but the RT and Routemaster both set the bar high enough that no other bus will likely be remembered as well or as fondly.
yZEP.