Proof below. None on market.

What am I doing

Sales:

http://www.tf2outpost.com/trade/15506915

-sold for ge noir+21 keys=~4.7 buds then

http://www.tf2outpost.com/trade/16353843

-b/o of 4.5 buds

-seems to have overpaid his b/o with a c9 bubble (can't find anything that was added in bp histories): http://www.tf2outpost.com/trade/16361404

-4.5 buds

http://www.tf2outpost.com/trade/16401717

-b/o of 4.5 buds

-seems to have sold for ghosts bonk helm+blizz hetman's+planets hard top+flies beret (outdated): http://www.tf2outpost.com/trade/16547008 + gold bks: http://www.tf2outpost.com/trade/16547176

-a bit more than the b/o so counted as 4.5 buds

http://www.tf2outpost.com/trade/15695180

-beret+steaming tyrants sold for aces war pig=~5.1 buds, outlier

http://www.tf2outpost.com/trade/15955911

-b/o of 4 buds

-bought spellbound nano: http://www.tf2outpost.com/trade/15682410

http://www.tf2outpost.com/trade/16120534

-b/o of 5 buds

-sold for bubbling ke+killstreak wanga ( http://www.tf2outpost.com/trade/16353775 )=~3.8 buds using his price

http://www.tf2outpost.com/trade/16755708

-sold for 5 buds+nnb cosa+bubbling gonzilla=~6.4 buds, outlier, clearly higher than all b/os

Sales: 3.8, 4.5, 4.5, 4.7, 5.1, 6.4

Low end is 3.8 which looks a bit far off but with the b/o of 4 it looks ok. Apparently 4.5 should be high end, I'm too tired to think now. Overpay and original prices used.