Tyrant mini:

http://www.tf2outpost.com/trade/18439964 Sold for Time Warp War Pig (11.8)

11.8 * 0.9 = 10.62 (10.6)

Histories:

http://www.tf2outpost.com/item/440,2420792130,99,5

http://www.tf2outpost.com/item/440,2449244538,829,5

http://www.tf2outpost.com/trade/17183025 Sold for Arcana Tyrants (Outdated at 11.4, mini at 8.55)

8.55 * 0.9 = 7.695 (Rounding to 7.7)

Histories:

http://www.tf2outpost.com/item/440,2420792130,99,5

http://www.tf2outpost.com/item/440,2329968059,99,5

Arcana Tyrant mini:

http://www.tf2outpost.com/trade/18631762 Sold for Aces Hat of Cards (10) + sweets (~0.4)

10.4 * 0.9 = 9.36 (rounding to 9.4)

Histories:

http://www.tf2outpost.com/item/440,2595582094,99,5

http://www.tf2outpost.com/item/440,2474406370,825,5

http://www.tf2outpost.com/trade/18356238 Sold for 2 DBD Hat of Cardseseses (4.3 * 2)

8.6 * 0.9 = 7.74 (rounding to 7.7)

Histories:

http://www.tf2outpost.com/item/440,2595582094,99,5

http://www.tf2outpost.com/trade/18424936

7.7-9.4... maaaath....8.55.