6 month old price.

http://www.tf2outpost.com/trade/19924354

Sold for a Professional KS Australium Sniper Rifle w/ S. Parts: Damage Dealt and Headshot Kills

http://puu.sh/9y9c3/50408f35fe.jpg Professional KS kits sold for $31.37 which is 13 keys

2.4 + .8 = 3.2 * .9 = 2.9 buds w/ overpay

http://www.tf2outpost.com/trade/19934048

http://backpack.tf/profiles/76561198073109569?time=1401606000 doesn't look like any sweets were added

Offered on and sold for a Stormy Storm Wraith Wrap (3.3 buds)

http://www.tf2outpost.com/trade/19626619

Offered on, and sold for, a Cloud 9 Caribbean Conqueror (this sale was used in it's price suggestion to set the range)

http://www.tf2outpost.com/trade/19949874

Sold for a Kill-a-Watt Safe 'n' Sound + 9 keys + sweets (outdated)

Rounding up to 3-3.3 buds