Proof below. 4 month-old price.

Clean only

Sales:

http://www.tf2outpost.com/trade/16636735

-stash+nnb trophy ( http://www.tf2outpost.com/trade/16938166 ) bought clean ge stash=~6.6 buds

http://www.tf2outpost.com/trade/17277416

-b/o of 9 buds

-stash+9 keys+sf gru+small stuff bought clean beams phantom: http://www.tf2outpost.com/trade/17722241

-~6.9 buds

http://www.tf2outpost.com/trade/15994606

-wanted 6.5 buds

-buyer's bp:

http://backpack.tf/id/76561198110555782?time=1388217600 hearts jeepcap (year old price)+106 keys

http://backpack.tf/id/76561198110555782?time=1388390400 hearts stash+5 keys+v. bills (he bought it for 27 keys)

-~6.2 buds but jeepcap price is very old

http://www.tf2outpost.com/trade/15819240

-wanted 8 buds

-accepted 6 buds but didn't go through

-unclear what it sold for

Current trades:

http://www.tf2outpost.com/trade/17795478

-b/o of 8 buds

-notable offers:

clean scorching pot (slightly outdated)=6.3

http://www.tf2outpost.com/trade/17355281

-wants 7 buds, almost 1 month

-notable offers:

burning dappers (outdated)=6.1

scorching pot again

miami hallmark (outdated)-1 bud=6.5

http://www.tf2outpost.com/trade/12909180

-wants ~6.9 buds, quite a few months because not accepting any unusuals and only wants pure

-recent notable offers:

lantern chapeau=5.9

hearts rack+sf rl=~6.6

6.9 collecting (bought another hat)

http://www.tf2outpost.com/trade/7857619

-year old trade, nothing below 6 buds, doesn't seem to be responding anymore

-recent notable offers:

blizz ushanka+4 buds=6.4

ge trilby+3 buds=6.6

6 buds

7 buds (same person as above)

9 buds (clear outlier)

miami swagman+searing trilby (outdated)=5.9

stormy tc=5.9

hearts rack+sf rl again

6 buds

11 buds (clear outlier, same person as the 6, 7, 9 offer)

aces wp (highly doubt it's still so high)=7

ge brigade+2 buds+10 keys=6.2

burning dapper again

burning chief=6.8

Sales: 6, 6.2, 6.6, 6.9

Sales as well as most notable offers range from 6-7 supporting my range. Sales and offers at each end too.