Proof below. 6 month-old price.

Clean only

Sales:

http://www.tf2outpost.com/trade/18041293

-bought beams tree: http://www.tf2outpost.com/trade/18061726

-5 buds

http://www.tf2outpost.com/trade/17891202

-b/o of 5.5 buds

-sold for scorching topi+miami bolted birdcage (unpriced)+sf huntsman

http://www.tf2outpost.com/trade/16971391

-wanted 5 buds

-sold for o.f. bomber+dp attendant=over b/o of 5 buds

http://www.tf2outpost.com/trade/18227650

-wanted 5.5 buds

-ke+1 bud bought misty honcho (very outdated): http://www.tf2outpost.com/trade/18442297

-~4.2 buds

http://www.tf2outpost.com/trade/18232910

-wanted 5 buds

-bought beams pe: http://www.tf2outpost.com/trade/17957049

-~4.2 buds

http://www.tf2outpost.com/trade/17499418

-wanted 5 buds

-seems to have sold for c9 marauder+steaming ushanka (outdated): http://www.tf2outpost.com/trade/17512139

-~4.9 buds then

http://www.tf2outpost.com/trade/17473025

-sold for kaw pot (outdated)+bubbling exec=~5.7 buds, clear outlier and pot is likely lower

http://www.tf2outpost.com/trade/17568086

-b/o of 5 buds

-sold for 5 buds

http://www.tf2outpost.com/trade/17548710

-wanted ~4.2 buds

-bought hearts drill: http://www.tf2outpost.com/trade/17523980

-4.2 buds due to b/o

http://www.tf2outpost.com/trade/17380034

-wanted 5 buds

-bought max+sf rl: http://www.tf2outpost.com/trade/17265134

-4.4 buds then

Sales: 4.2, 4.2, 4.2, 4.4, 4.9, 5, 5, 5, 5.7

Sales mostly range from 4.2-5 so that the price. 4.2 is kinda low but seems that people are willing to accept that. 5 is very possible though.