Proof below (6 sales).

Prices used are of time of sale.

Sales:

http://www.tf2outpost.com/trade/14382179

-cloudy moon ketche+43 keys sold for fez=5.1 buds taking mid price

http://www.tf2outpost.com/trade/14096327

-gbh marauder sold/bought for fez+nnb gonzilla+8 keys=~6.3 buds

http://www.tf2outpost.com/trade/14172434

-fez+1 bud+clean juju, bought DBD merryweather (summer shades wasn't traded)

http://www.tf2outpost.com/trade/14002617

-sold/bought for this scorching milkman: http://www.tf2outpost.com/trade/14134357

-6.3 buds

http://www.tf2outpost.com/trade/14273633

-bought ghosts fez+1 bud

http://www.tf2outpost.com/trade/13938550

-sold/bought for c9 milkman seen here: http://www.tf2outpost.com/trade/13949289

Current trade:

http://www.tf2outpost.com/trade/14393376

-b/o 8 buds

Priced sales: 5.1, 6.3, 6.3

The known sales included in the suggested range. The sales with yet to be priced unusuals should roughly go along the range.