One of the most unlikely elements to have a Latin name has one - Antimony, Sb, "Stibium"

Sale 1

http://www.tf2outpost.com/trade/27005384 Sold for 14 keys

B/O for Noble was 15

X = 14

Keys https://gyazo.com/45ba32feabf021e484c1457ebd94e593 http://backpack.tf/profiles/76561198084531931?time=1444114800&compare=1444201200 http://backpack.tf/profiles/76561198012560478?time=1444201200&compare=1444287600

Noble http://backpack.tf/item/284327424

Sale 2

http://www.tf2outpost.com/trade/27509404 Sold for C9 Goggles + a key + 0.5 keys of sweets

B/O for Noble was 15

B/O for Goggles was 20

X = 17*0.9 + 1 + 0.5*0.9

X = 17

X = 15 (B/O)

Noble http://backpack.tf/item/284327424

Goggles http://backpack.tf/item/4020832948

Trade http://backpack.tf/profiles/76561198106471288?time=1448697600&compare=1448784000

Mini for Goggles

http://backpack.tf/vote/id/56750558dea9e919147f767d 17 keys, using 17

Sale 3

http://backpack.tf/profiles/76561198181490943?time=1448784000&compare=1448870400 WHEN KEY HISTORIES DON'T MATCH