The most expensive iPhone X is out that is highly made up 24K Gold Plated. iPhone X gold version is unboxed by famous YouTuber Unbox Therapy.
24K Gold Plated Apple iPhone X
It is a customized version and electroplated with real Gold by De Billas Luxury. iPhone X Gold version cost around $2000 and Apple Watch Series 3 for $1300. Along with that, there consist of gold version accessories and also he unboxed the Gold plated Apple Watch Series 3 too with Gold plated Apple Watch Charger.
You can buy iPhone X Gold Plated Version from here.