http://www.techradar.com/news/only-a-few-million-iphone-x-units-may-be-available-at-launch

If you’re hoping to snap up an iPhone X there’s good news and bad news. The good news is that according to analyst Ming-Chi Kuo the worst remaining production problems (which apparently involved the flexible printed circuit boards for the antenna and wide-angle rear camera) have almost been overcome.

The bad news according to Kuo (as reported on by MacRumors) is that the problems have taken long enough to resolve that Apple will probably only be able to ship 2-3 million iPhone X units ahead of launch, meaning that’s all that could initially be available, so initial supplies may be even tighter than previously believed.