2 exist, 1 hasn't sold in over 6 months.

Sales

http://www.tf2outpost.com/trade/24542923 - Heats Softcap + Bubbling Ze Goggles + Gold Botkiller Minigun + Spec KS SF Stickybomb.

http://backpack.tf/item/217703721 Softcap ~2.9 buds.

http://backpack.tf/item/1314728786 Goggles ~1 bud.

http://backpack.tf/item/1164046955 Botkiller Minigun ~ 0.3 buds.

http://backpack.tf/item/618605505 Stickybomb ~14 keys in classifieds.

(2.9 + 1 + .3 + 1)*(0.9) = 4.7 buds

http://www.tf2outpost.com/trade/24512902 - Scorching Mullet

~ 4 buds but sold in under a day. Outlier

Goggles Mini 12-13 keys, close enough to a bud.

http://www.tf2outpost.com/trade/24692300 - Selling for 12

http://www.tf2outpost.com/trade/24577260 - Selling for 13

Mullet mini ~4.4 buds

http://www.tf2outpost.com/trade/24513267 - Sold with spec ks aussie knife + pro ks aussie tomislav + 17 keys for a Miami Bomber (10) Which comes to about 5.5 buds.

http://www.tf2outpost.com/trade/24748409 - Selling for ~4.3 buds

http://www.tf2outpost.com/trade/24137733 - Selling for ~4.5 buds