Rareness.

SALES:

http://www.tf2outpost.com/trade/23280214 Sold for KS Attendant (Outdated at 10.2, mini at 10) + Max (3.3)

(10 * 0.9) + 3.3 = 12.3 (rounding to 12, seller's B/O)

Histories:

http://www.tf2outpost.com/item/440,3088053811,981,5

http://www.tf2outpost.com/trade/23290736

http://www.tf2outpost.com/trade/23412552 Sold for Secret Lucky (11.3)

11.3 * 0.9 = 10.17 (rounding to 10.2)

Histories:

http://www.tf2outpost.com/item/440,3088053811,981,5

http://www.tf2outpost.com/item/440,3118928660,701,5

Attendant mini:

http://www.tf2outpost.com/trade/23290791 Sold for Demonflame Bubble (12)

12 * 0.9 = 10.8 (rounding down to 10, seller's B/O)

Histories:

http://www.tf2outpost.com/item/440,3091303934,213,5

http://www.tf2outpost.com/item/440,3100005587,597,5

Only recent sale, taking 10 buds.

Let it ride.