I don't but we looked at some quite a while ago. I think it depends on a lot of things, like one kit home seller will have a kit home put up, but you then have to get the place wired, painted and fitted with fixtures, kitchen, bath etc.. source the work yourself you know.. but i have also seen a kit home, where you can add those 'extras' on. so you would pay a base price for the kit home, then extra for the wiring, or kitchen to be put in, painting, bathroom, built in cupboards etc...
I think they are something that you really need to look at the fine print or speak to someone about them. We looked at a display kit home a few years ago, which had the price on it with everything finished off inside.