Sale #1

http://www.tf2outpost.com/trade/18661172

Traded this + Bubbling Killer Exclusive(2.9 buds) for duped Brotherhood of Arms Bubbling(5 buds * 0.9 = 4.5 buds) Refer to mini suggestion

Backpack of seller

http://backpack.tf/profiles/76561198089755443?time=1395298800 Before

http://backpack.tf/profiles/76561198089755443?time=1395385200 After

Backpack of buyer

http://backpack.tf/profiles/76561198063316793?time=1395298800 Before

http://backpack.tf/profiles/76561198063316793?time=1395425553 After

Total: ~1.6 buds

Sale #2

http://www.tf2outpost.com/trade/18706972

Sold for Strange Australium Sniper Rifle with robots destroyed part(~2.5 buds * 0.9 = ~2.3 buds)

Backpack of seller

http://backpack.tf/profiles/76561198063316793?time=1395471600 Before

http://backpack.tf/profiles/76561198063316793?time=1395558000 After

Backpack of buyer

http://backpack.tf/profiles/76561198109047653?time=1395471600 Before

http://backpack.tf/profiles/76561198109047653?time=1395582085 After

Total: ~2.3 buds

Invalid sales due to unpriced hat and unable to identify content of sale

Sale #3

http://www.tf2outpost.com/trade/19493767

Can't identify content of sale.

Backpack of seller

http://backpack.tf/profiles/76561198128606353?time=1397890800 Before

http://backpack.tf/profiles/76561198128606353?time=1398582000 After

Backpack of buyer

http://backpack.tf/profiles/76561198045417522?time=1398495600 Before

http://backpack.tf/profiles/76561198045417522?time=1398644337 After

Sale #4

http://www.tf2outpost.com/trade/18748513

Sold for Buccaneer's Bircorne Disco Beat Down(No price)

Mini suggestion for duped Brotherhood of arms Bubbling

1. http://www.tf2outpost.com/trade/19635148

http://www.tf2outpost.com/trade/19753127 Sold for 4 buds + Professional Killstreak Genuine Awper

2. http://www.tf2outpost.com/trade/19256703 Sold for Arcana Marauder (4.95 buds * 0.9 = ~4.5 buds ) + Soldered Sensei Dead Presidents

3. http://www.tf2outpost.com/trade/19154549 Sold for Flaming Lantern Pyromancer(4.45 * 0.9 = 4 buds) + ~10 keys in sweets. Making this ~4.5 buds.

4. http://www.tf2outpost.com/trade/18956377 Traded this + ~5-6 keys in items for Secret Festivizer(4.2 * 0.9 = ~3.8 buds) + Planets Brainiac(2.5 *0.9 = ~2.3 buds). Making this about 5.8 buds.

It seems that duped or none duped doesn't matter to the value. Therefore, taking the current price 5 buds as the duped price.