Sale 1

Sold for a Eerie Crones (29) 29*0.9=Rounding to 26 Buds

before - http://backpack.tf/profiles/76561198013095772?time=1418291303

after - http://backpack.tf/profiles/76561198013095772?time=1418457600

Sale 2

Sold for a Secret Stash (26) (Already applied overpay in mini, check below) Rounding to 26 Buds

before - http://backpack.tf/profiles/76561198041060358?time=1418025600

after - http://backpack.tf/profiles/76561198041060358?time=1418183180

Sale 3

Sold for DaD Allbrero (13*) + Secret Oiled boy (5.4) + Stormy 13th Nano (5*) + Lantern Bonnet (2) + Ghastly Bonnet (2.6*) = 28*0.9= Rounding to 25 Buds

before - http://backpack.tf/profiles/76561198038986052?time=1421654400

after - http://backpack.tf/profiles/76561198038986052?time=1421740800

Mini for Ghastly Bonnet (2.6)

Sold for 1 earbuds + 24 Keys (Buds as 15 keys in that time)

before - http://backpack.tf/profiles/76561198066835009?time=1417248000

after - http://backpack.tf/profiles/76561198066835009?time=1417334400

Mini for DaD Allbrero (13)

Sold for 2 max + 2 buds + 17 keys +DbD Wraith (3.9) = 13.7

before - http://backpack.tf/profiles/76561198000174125?time=1423209600

after - http://backpack.tf/profiles/76561198000174125?time=1423296000

Sold with a Stormy 13h Nano (5) for a G.Fetti Viewfinder (18) = 13

before - http://backpack.tf/profiles/76561198071491128?time=1419804609

after - http://backpack.tf/profiles/76561198071491128?time=1419840000

Mini for Stormy 13th Nano (5)

Sold with a DaD Allbrero (13) for a G.Fetti Viewfinder (18) = 5

before - http://backpack.tf/profiles/76561198071491128?time=1419804609

after - http://backpack.tf/profiles/76561198071491128?time=1419840000

Mini for Duped Secret Stash (26) [Provided by polar]

http://backpack.tf/profiles/76561198043961035?time=1414566000 - Hearts Muffs (15) + Secret Attendant (11.3) + Time Warp Beret (2.5) = ~29 *0.9 = Rounding to 26 Buds

As suggested by polar in other suggestion 25~26 should be a fine range.