5 in existence, one doesn't like showing itself on that table. Only 3 have recent sales AFAIK.

Sale 1:

(See Mini#1)

The Item: http://backpack.tf/item/3563920105

The Trade: http://www.tf2outpost.com/trade/24771028

Seller: http://backpack.tf/profiles/76561198119349065?time=1422151257

Buyer: http://backpack.tf/profiles/76561197986203215?time=1422155226 (The item doesn't seem to show in his backpack, check the item history for confirmation that this is him if you don't believe this is the buyer)

Sold for a Steaming Company Man: http://backpack.tf/item/1863102704

1.25 (Rounded to 1.3 buds)

The Ketche was offered on this, no overpay is required. http://www.tf2outpost.com/trade/24792255

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Sale 2:

(See Mini#2)

The Item: http://backpack.tf/item/3563920105

The Trade: ---- No trades found.

Seller: http://backpack.tf/profiles/76561198115471878?time=1422777600

Buyer: http://backpack.tf/profiles/76561198094713762?time=1422818543

The Ketche + Duped Knifestorm Vintage Tyrolean for a Molten Mallard Troublemaker's Tossle Cap.

(7.7+1.55)-(7.7*0.9) = 2.32 (Rounded to 2.3 buds)

Tyrolean: http://backpack.tf/item/1221228044

Tossle: http://backpack.tf/item/3276361256

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Sale 3:

The Item: http://backpack.tf/item/3563920105

The Trade: ---- No trades found.

Seller: http://backpack.tf/profiles/76561198060735051?time=1425124291

Buyer: http://backpack.tf/profiles/76561198002075868?time=1425124491

Sold for 19 keys.

19/12 = 1.583 (Rounded to 1.6 buds)

Keys were 12 keys: http://backpack.tf/vote/id/54dbfe63b98d8841718b4706

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Sale 4:

(See Mini #3)

The Item: http://backpack.tf/item/3619427650

The Trade: ---- No trades found.

Seller: http://backpack.tf/profiles/76561198160297740?time=1426948032

Buyer: http://backpack.tf/profiles/76561198164776180?time=1426958649

Sold for a Dead Presidents Counterfeit Billycock, Strange Killstreak Festive Force-A-Nature, Strange Specialized Killstreak Festive Crusader's Crossbow & Strange Festive Shotgun.

(1.6+2.4+3)/10 = 0.7

0.7*0.9 = 0.63 (Rounded to 0.6)

1+0.6 = 1.6 buds

Billycock: http://backpack.tf/item/1782052023

FaN: http://backpack.tf/item/2219014247 + Point Blank Kills (7/2 = 3.5 ref (Adds an extra 0.2 keys))

Crossbow: http://backpack.tf/item/2257180293 + Players Killed While Taunting (Nothing)

Shotgun: http://backpack.tf/item/3343605327 + Players Killed While Taunting (Nothing)

Keys were 17–17.33 ref (17.17): http://backpack.tf/vote/id/55059bb6b98d887e448b5239

--- Price changed 2 hours after this trade happened

I am not adding any value for the "Players Killed While Taunting" part but I will add half the value of the "Point Blank Kills" part.

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Sale 5 {outlier - too low}:

The Item: http://backpack.tf/item/3540800711

The Trade: http://www.tf2outpost.com/trade/24878923

Seller: http://backpack.tf/profiles/76561198072868903?time=1424419200

Buyer: http://backpack.tf/profiles/76561198038826744?time=1426700287

Sold for 10 keys + 67 refined.

67/15.33 = 4.37 (Rounded to 4.4 keys)

10+4.4 = 14.4 keys

14.4/12 = 1.2 buds

Keys were 15.33: http://backpack.tf/vote/id/54dbfa9fb98d881e1c8b458b

Buds were 12 keys: http://backpack.tf/vote/id/54dbfe63b98d8841718b4706

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Minis:

#1 - Company Man: http://backpack.tf/item/1863102704 - Sold for 15 keys. (15/12 = 1.25)

Seller: http://backpack.tf/profiles/76561198065212787?time=1423468800

Buyer: http://backpack.tf/profiles/76561198053153056?time=1424511096

Buds were 12 keys: http://backpack.tf/vote/id/54dbfe63b98d8841718b4706

#2 - Vintage Tyrolean: http://backpack.tf/item/1221228044 - Sold for a Spellbound Honcho's Headgear. http://backpack.tf/item/2039115914

Seller: http://backpack.tf/profiles/76561198094713762?time=1424419200

Buyer: http://backpack.tf/profiles/76561198106373254?time=1426932291

8.5*0.9 = 7.65 (Rounded to 7.7 buds)

#3 - Billycock: http://backpack.tf/item/1782052023 - Sold for a Circling TF Logo Hard Counter: http://backpack.tf/item/184181667

Seller: http://backpack.tf/profiles/76561198072009241?time=1426968841

Buyer: http://backpack.tf/profiles/76561198134589572?time=1426991583

1.05*0.9 = 0.945 (Rounded to 0.95 buds which rounds to 1 bud)

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As always, please try and keep the comments relevant, please don't make comment comprised only of "upvote" or "downvote". Counter-proof / supportive proof is always appreciated!