I just realized that Cashew gave a whole suggestion for this 1 month ago, though imma use my own proof.

First link:

http://www.tf2outpost.com/trade/20460493 Sold for a Purple Energy Conjurer's Cowl(4.7 Buds) - http://www.tf2outpost.com/trade/20832996

The Batter's Helmet was offered on the Cowl, so no overpay is needed.

Total = 4.7 Buds

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Second link:

http://www.tf2outpost.com/trade/20845137 Sold for Circling Heart A Rather Festive Tree(4 Buds) + Vintage Lugermorph(8 Keys) + Strange PDA(7.8 Keys) - http://www.tf2outpost.com/trade/20959575 and http://www.tf2outpost.com/trade/20959626 and this http://www.tf2outpost.com/trade/20959733

Circling Heart A Rather Festive Tree(4 Buds) + Vintage Lugermorph(8 Keys) + Strange PDA(7.8 Keys) = 4.83 rounding to 4.8

4.8*0.9 = 4.32 rounding to 4.3

Total ~ 4.3 Buds

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Third link:

http://www.tf2outpost.com/trade/21147833 Sold for a Circling Peace Sign Whoopee Cap(1.4) + Max's Severed Head(3 buds level 28) - http://www.tf2outpost.com/trade/21209581 and http://www.tf2outpost.com/trade/21236251

Mini suggestion for the Whopee cap:

http://www.tf2outpost.com/trade/21236251 Sold for a Bubbling Backward's Ballcap(1.4 Buds) - http://www.tf2outpost.com/trade/21258230

The Whopee Cap was offered on the Ballcap, so it doesn't need overpay.

Circling Peace Sign Whoopee Cap(1.4)*0.9 = 1.26 rounding to 1.3

1.3+3 = 4.3 Buds

Total = 4.3 Buds

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Fourth link(outlier):

http://www.tf2outpost.com/trade/20570562 Sold for a Blizzardy Storm Hong Kong Cone(5.8 Buds) - http://www.tf2outpost.com/trade/21126819

The Hong Kong Cone was offered on the Batter's Helmet so no overpay is needed.

Total = 5.8 Buds

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Fifth link(outlier):

http://www.tf2outpost.com/trade/20381802 Sold for a Cloud 9 Scotsman's Stove Pipe(3.4 buds outdated though) + Duped Burning Flames Ze Goggles(4.9 Buds outdated too) - http://www.tf2outpost.com/trade/20197839

Both hats are outdated and the Ze Goggles where duped, therefore I won't try to price this offer. Though Cashew said that it likely crossed the 6 Bud mark so it's probably an outlier.

Total = N/A

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Sixth link(couldn't find proof for a mini suggestion):

http://www.tf2outpost.com/trade/21184374 Sold for a Overclocked Company Man(5.3 outdated) - http://www.tf2outpost.com/trade/21248808

I did try to make a mini suggestion for this, but the only sale I was able to identify was this:

http://www.tf2outpost.com/trade/21248808 Sold for all of this - http://www.tf2outpost.com/trade/21351886

I didn't really feel like making mini suggestions for all of the killstreak stuff.....

Total = N/A

Seventh link(outlier):

http://www.tf2outpost.com/trade/21158120 Quicksold for 4 Buds

Buds are pure so no overpay is needed(cap'n obvious)

Total = 4 Buds

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This took way longer than it should have, so your counter proof better be good.