Contour Enthusiasts Group Archives Forums Modifications Aesthetics HID light leagle?

I saw an eBay auction of HID lights at around $10-20. Is that real HID? Some other places sell them for about $800. Technically what's the difference? By the way, is it leagle to use on public roads? As I understand the real HID is illeagle but what about the $10 ones? Thanks.