http://www.techradar.com/news/iphone-x-ebay-price-heres-the-ridiculously-marked-up-cost

The iPhone X is inbound, with pre-orders having finally gone live. But, anyone who didn't order quickly may be on the tail end of a decent wait for the iPhone X supply to meet the demand, unless they turn to eBay. 

As with many supply shortages of popular items, online re-sellers are offering the iPhone X for sale, but they're also showing what high demand and low supply does to price.