Memory Leak Private Eye

This is my first unusual price suggestion, so let me know if I did something wrong.

Sale #1:

http://www.tf2outpost.com/trade/19474916

Sold for Blizzardy Storm Dragonborn Helmet (~1.8) + Terror-Watt Bot Dogger (~1.2)

Items histories:

http://www.tf2outpost.com/item/440,2575003862

http://www.tf2outpost.com/item/440,2575003864

Total: ~3 buds

Sale #2:

http://www.tf2outpost.com/trade/19462833

Sold for Stormy Storm A Rather Festive Tree (~2) + little sweets (Team Captain, Gentleman's Ushanka, Desert Marauder and few random weapons)

Seller's backpack:

http://backpack.tf/profiles/76561198050931408?time=1398409200 - before

http://backpack.tf/profiles/76561198050931408?time=1398495600 - after

Total: ~2.1 buds

Sale #3:

http://www.tf2outpost.com/trade/19041673

Sold for Terror-Watt Pirate Bandana (unpriced) - http://www.tf2outpost.com/item/440,2501449932

Mini-research for Bandana:

Sold for 2.5 - http://www.tf2outpost.com/trade/19546914

Quicksold for 25 keys - http://www.tf2outpost.com/trade/19224823

Looking for 3+ with no sucess - http://www.tf2outpost.com/trade/19432451

So this sale is ~2.3-2.5 buds

Well, the high-end probably is too high, resuggesting