Admittedly, I've very little proof, but this is what I've scrounged up. With only two different hats on outpost, and history far between each one, this is all I could do. These three trades.

http://www.tf2outpost.com/trade/15542597 - B/O of 28 keys. Still has hat.

http://www.tf2outpost.com/trade/14837132 - A MONTH OLD. POSSIBLY IRRELEVANT - B/O 2 buds

http://www.tf2outpost.com/trade/15132098 - Heres a gifted one being "Quicksold" for 40 keys. Which I'll point out is less than the cleaner one. This is another of his trades 3 week ago, and its still being "Quicksold" at the same price. http://www.tf2outpost.com/trade/15029946 I'll also point that I've looked through each of his trades, and I've either not seen them, or he has no proof of his offers of a Max or Cauldron Bombing Run.

In conclusion - I have no sales. But niether do these two hats. Niether of them are even trying for anywhere 2.9 buds. Both are closer to 2.

I am only saying 1.8 buds as the price based on the clean one, because nobody wants to pay nearly 10 keys more for a dirty one.