Why is it that a UV Plate Setter is so damned expensive?

UV Plate Setters basically have an array of the same lasers that are used in the BluRay player you have at home. These are made by the million, and cost buttons to produce.

The control circuitry and mechanics that write the plate image is the same as in a thermal plate setter – which uses a high power infra-red laser. So how come a Conventional UV Plate Setter is still the same price as a Thermal Plate Setter?

Answers on a post-card to the usual address please!