Sigh... Reposting AGAIN because 2 buds was too high. Sorry about the last derp suggestion. Updating a 6 month old price. Here are all the results from Outpost:

http://www.tf2outpost.com/trade/7972684 (Sold for 1 bud + 8 keys, so 35 keys)

http://www.tf2outpost.com/trade/8059934 (Same guy, different hat, again sold for about 35 keys)

http://www.tf2outpost.com/trade/8154461 (Sold for SF Rocket Launcher, but owner had to add some sweets.

http://www.tf2outpost.com/trade/8053167 (Best offer is a Smoking Trilby, so about 32ish keys)

http://www.tf2outpost.com/trade/6940169 (C/O of a Smoking Private Eye, so about 1.7 buds or 45 keys)

http://www.tf2outpost.com/trade/4180182 (B/O 2 buds, 3 month old C/O of 1 bud + a Black Bill's, so about 35 keys.

http://www.tf2outpost.com/trade/8321287 (No legit offers yet, history shows nothing.)

http://www.tf2outpost.com/trade/8326613 (B/O 2 buds, C/O of Strange Machina and Sapper, so about 1.3 buds or 34 keys)

http://www.tf2outpost.com/trade/8355168 (No offers yet)

http://www.tf2outpost.com/trade/8160833 (Previous owner of above trade, sold for Steaming Chieftain, so about 1.2 buds or 32 keys)

http://www.tf2outpost.com/trade/8270992 (Highest offer is an Orbiting Fire Fukaamigasa, so about 1.3 buds or 34 keys)

http://www.tf2outpost.com/trade/8116095 (No offers, history shows nothing)

http://www.tf2outpost.com/trade/8096579 (No offers, history shows nothing)

Outliers:

http://www.tf2outpost.com/trade/4789723 (4 month old trade, Highest offer was 3 months ago for 1 buds + 15 keys, so about 42 keys)

http://www.tf2outpost.com/trade/3185894 (5 month old C/O of about 54 keys)

http://www.tf2outpost.com/trade/6790227 (1 month old, may or may not be relevant, sold for Max Head + Sweets, so about 2 buds or 54 keys)

Well, there they are. If you downvote, let me know why. Thanks. :)