Around 250 were built, almost four times as many as its predecessor, the Plaxton Bustler, over a similar number of years.

The most common chassis was the Leyland Tiger, largely due to orders from the UK military for over a hundred, some of which were left-hand drive.

Other chassis were the Volvo B10M (including short wheelbase examples); some of the last Bedford Y series to enter service; Dennis Javelin; and around fifteen secondhand Leyland Leopard chassis being rebodied.

This later became L2B, presumably to avoid confusion with the Paramount 4000, which also used the letter D. For military vehicles, MOD was used instead.

The number 3000 in the model's name refers to its approximate height in millimetres (like the Paramount 3200, 3500 and 4000).