Meh.

Offer

http://www.tf2outpost.com/trade/23696178 - Had a collecting offer of 40 keys = 2.7 buds and he is likely going to accept it.

Sale 1

http://www.tf2outpost.com/trade/23616405 - Sold for 25 keys + Gifted Vivid Plasma Jumper's Jeepcap (24 keys) (25 + 24*0.9 = 47 keys = 3 buds)

Mini for the Gifted Vivid Plasma Jumper's Jeepcap

http://www.tf2outpost.com/trade/23691367 - BO of 23 keys

http://www.tf2outpost.com/trade/23282086 - Sold for 25 keys

= 24 keys

Sale 2

http://www.tf2outpost.com/trade/22982479 - Sold for a Kill-a-Watt Hat With No Name (1.8*0.9 = 1.6 buds) (Outlier)

Feel free to counter / support my proofs.