Rare Earth Element Prices/kgI have researched what these REE's are worth, here is what I found. Make your own conclusions, lloks really big to me.
Lanthanum - $135/kg
Cerium -$130/kg
Praseodymium -$240/kg
Neodymium -$245/kg
Samarium -$150/kg
Europium -$965/kg
Gadolinium -$300/kg
Terbium -$1050/kg
Dysprosium -$540/kg
Holmium -$740/kg
Erbium -$175/kg
Thulium -$180,000/kg (no misprint)
Ytterbium -$23,000/kg (no misprint)
Zirconium -$30/kg
Niobium -$66/kg
Tantalum -$350/kg
Those numbers look really good to me.