Thats because geoff quoted with fitting and painting (for a good job).
If it's a fibreglass front bar for example, I was told by a panel beater that they are difficult to fit, and should allow $400 JUST for fitting the front bar.
A good proper job, will most likely also consit of a proper blending job on the panels, which means more labour on removing and replancement more prepping, more painting ect ect.. It all starts to add up.