Made By: Stuart Hughes

This is the first of three times Stuart Hughes appears on this list (the dude likes to make a lot of obsecenly expensive versions of high tech items and gadgets). The sound system is made out of 24k gold, diamonds, and gemstones, and, unsurprisingly, is one of the more expensive items on this list, totaling near $1.9 million. If you were hoping to get one you probably already missed your chance: only five of these sounds systems were made.