The Red Ghost Cube is the eleventh and the final one in the series that Uwe Meffert produced in 2014. The reason why it is so special is that only a tiny number (one source says just 30) exist and according to Uwe Meffert it will never be available for sale. It was made exclusively to be given as a prize to winners of major speedcubing tournaments. This seemly harmless decision caused great controversy amongst some puzzle collectors. They argued that most speedcubers have little interest in such puzzles and having purchased many of Uwe's puzzles over the years they should be given the chance to own one.
Ghost Cubes were first made by Adam Cohen. Influenced by my own Golden Cubes he made a 3x3x3 version. Adam and Uwe teamed up to mass produce the cubes in 2014. They made five stickered versions- shiny gold on black plastic, grey on black plastic, white on black plastic, black on white plastic and matt gold on black plastic. The matt gold version was only available to those buying the whole stickered Ghost Cube set. They also made the six metalised (or metalized in USA) versions you see here. The green was only available to those buying the whole set though as stated the red was not available for sale to anyone.
All Metalised Ghost Cubes are sold out and the only place you are likely to find them now is Ebay.