Found a solution.

Sale 1

http://www.tf2outpost.com/trade/21087116 - Sold for a Searing Plasma Noble Amassment of Hats (3.2 buds) and Haunted Ghosts Rimmed Raincatcher (2 buds) (5.2*0.9 = 4.7 buds)

Sale 2 (a little old but should be fine)

http://www.tf2outpost.com/trade/20979281 - Sold for a Burning Flames Jumper's Jeepcap (5.4 buds). No overpay.

Mini for Burning Flames Jumper's Jeepcap

http://backpack.tf/vote/id/540b2af94dd7b80a6a8b4572

Unusable sales

http://www.tf2outpost.com/trade/22187356 - Sold with a ? for a Vivid Plasma Sammy Cap, a Phosphorous Company Man and a Miami Nights Deep Cover Operator (Complicated)

http://www.tf2outpost.com/trade/21672215 - Sold for a Anti-Freeze Backbiter's Billycock

http://www.tf2outpost.com/trade/21657199 - Sold for a Sunbeams Cloud Crasher

http://www.tf2outpost.com/trade/21446589 - Sold for a It's A Secret To Everybody Big Elfin Deal

Feel free to counter / support my proofs.