Alright, here goes. Have used some proof found myself and some from a recent suggestion.

http://www.tf2outpost.com/trade/21907433

Very recent sale, seems to have sold for a Steaming Ye Olde Baker Boy (~0.9 buds after overpay calculated). I could not find any sweets while researching.

http://gyazo.com/181322538babedc5269a7e09dd8f0989

http://gyazo.com/62c97cfc4b805dffe6db83e201da0b9e

++++

http://www.tf2outpost.com/trade/21874317

Very recent sale. Seller added 10 keys for a Genuine Grandmaster (~0.9 buds after overpay calculated and keys subtracted)

http://gyazo.com/8a5572f07970ac45240e766afce6539a

++++

http://www.tf2outpost.com/trade/21912560#latest

Very recent sale. Sold for 23 keys pure

http://gyazo.com/fb66750f4bbb52b0e95c498652e015d5

++++

http://www.tf2outpost.com/trade/20741353

Old sale. Sold for Blizzardy Storm Crown (~1.4 after overpay calculated) (Thanks to -D00M-)

++++

http://www.tf2outpost.com/trade/20979385

Old sale. Sold for a Stormy Storm Vintage Merryweather (~1.4 after overpay calculated) (Thanks to -D00M-)

++++

http://www.tf2outpost.com/trade/21660019

Pretty recent sale. Seller added 5 keys for an Aces High Harmburg (~2 after overpay and keys subtracted) (Thanks to -D00M-)

Excluded a link from -D00M-'s suggestion as I considered it invalid.

Current set buyouts on outpost vary from 1.2-1.5 buds.

http://www.tf2outpost.com/trade/20418669

http://www.tf2outpost.com/trade/21928931

http://www.tf2outpost.com/trade/21894275

http://www.tf2outpost.com/trade/21924798

++++

One seller on Classified, for 28 keys (~1.5 buds)

http://backpack.tf/classifieds/?item=Whoopee%20Cap&quality=5&particle=29

Thank you for reading!

I'm new to suggesting so any constructive critisicm is welcome!

-Jogz