Bubbling Crone's Dome (4.2-4.7 buds)

http://www.tf2outpost.com/trade/14668236 - sold with a blizz tyro (2) for a scorching dappers (~6.2) = 4.2

http://www.tf2outpost.com/trade/13875597 - sold for burning goggles + 15 keys ( http://www.tf2outpost.com/trade/14364853 ) = ~4.7

http://www.tf2outpost.com/trade/13369627 --> http://www.tf2outpost.com/trade/13875597

seems that he bought it with a lantern hoodie (4.3 old price)

http://www.tf2outpost.com/trade/13801910 - qs for 3.5 (outlier)

All the other sales I found were for duped ones (which is worth ~4 buds):

http://www.tf2outpost.com/trade/14089979 --> http://www.tf2outpost.com/trade/14109228

http://backpack.tf/id/76561198044448294?time=1378018800

sold for a ge attendant (5) but added 11 keys (0.5) = 4.5

http://www.tf2outpost.com/trade/14648486 - sold for 4 buds ( http://www.tf2outpost.com/trade/14666239 )

http://www.tf2outpost.com/trade/14094533 --> http://www.tf2outpost.com/trade/14143126 - sold for a clean self made key (~4 buds back then)

http://www.tf2outpost.com/trade/13706214 - sold for a roboactive tricorne + 12 keys (3.5) (outlier)