Unique Melody MEXT is a unique IEM based on a new approach to the Bone Conduction driver. It uses six drivers per side and it's priced at $1099.
A Video Review of the great Unique Melody MEST.
Unique Melody MEST is the first hybrid IEM that uses four different types of drivers - bone conduction, EST, balanced armature, and dynamic. It is priced at $1399 for a universal version, and $1699 for custom.