Half of the "Rare Earth Metals" are actually more common than some Transition metals

Rare Earth Metals are metals like Cerium, Erbium, Terbium etc

Sale 1

http://www.tf2outpost.com/trade/27388525 Sold for Stormy Capotain

B/O for Fro was 14.5

B/O for Capotain was 12

X = 12*0.9

X = 11

Capo http://backpack.tf/item/782413701

Fro http://backpack.tf/item/1741619495

Trade http://backpack.tf/profiles/76561198066195760?time=1447401600&compare=1447315200

Mini for Capotain

http://backpack.tf/vote/id/5673e760ba8d889538a94a9b 12 keys, using 12

Sale 2

http://backpack.tf/profiles/76561198067966716?time=1446710400&compare=1446796800 Bulk for Blizz Belt

Sale 3

http://www.tf2outpost.com/trade/27467003 Sold for Nuts Panama + 7 keys of sweets

B/O for Fro was 13

Panama had no trade, presuming offered

X = 7*0.9 + 12*0.9

X = 17

X = 13 (B/O)

Panama http://backpack.tf/item/580587510

Fro http://backpack.tf/item/2228837113

Trade http://backpack.tf/profiles/76561198056494488?time=1448611200&compare=1448524800

Sweets https://gyazo.com/b4f8b04e3c3e7c6ffde658c524312828

Mini for Panama

http://backpack.tf/vote/id/5673f26bba8d880939a94ab7 12 keys, using 12