Proof below. 7 month-old price.

Clean only

Sales:

http://www.tf2outpost.com/trade/16761054

-wanted 5 buds

-tree+30 keys bought cloudy glengarry: http://www.tf2outpost.com/trade/16997557

-glengarry suggestor used this but had another sale close

-~4.2 buds

http://www.tf2outpost.com/trade/14721988

-sold for 4.5 buds

http://www.tf2outpost.com/trade/16523819

-b/o of 5 buds

-tree+4.5 buds bought cloudy tree (slightly outdated): http://www.tf2outpost.com/trade/14530669

-4.5 buds

http://www.tf2outpost.com/trade/16482220

-wanted 5 buds

-bought vivid sensei (unpriced but ~2)+black max: http://www.tf2outpost.com/trade/16477800

-would be around 4.3 buds but not using

Sales: 4.2, 4.5, 4.5

Simple price from sales. Not many sales so this is pretty much it. Overpay and original prices used.