Hey, Going to make a suggestion for this unusual. Keep in mind there is only 2 so finding sales with only 1 on outpost is not going to bring many sales. However, i did find some.

Sold for a dbd baker boy 2.8 buds *0.9 = 2.52 rounding to 2.5 buds. http://www.tf2outpost.com/trade/22459198

From what i can tell HornyPineApple and Boagsy are the same people.

In HornyPineapple backpack: http://backpack.tf/profiles/76561198108696264?time=1411282800

In boagsy backpack: http://backpack.tf/profiles/76561198059735911?time=1409900400

Proof of the dbd offer & sale http://www.tf2outpost.com/trade/22459198

Backpack after the sale: http://backpack.tf/profiles/76561198059735911?time=1411887600

Sold for a eerie orb fire shout shanko 2.3 buds *0.9 = 2.07 rounding to 2 buds.

Backpack before : http://backpack.tf/profiles/76561198128933308?time=1411801200

Backpack after: http://backpack.tf/profiles/76561198128933308?time=1411887600

P.S Sorry if this is confusing, it got me confused a lot also.

Making the low value 2 buds due to the sale of it to the eerie orb fire unusual, And the high value to be at 2.5 because of the DBD unusual sale.