Proof below. 6 month-old price.

Cleans only, correct me if I'm wrong.

Sales:

http://www.tf2outpost.com/trade/14796505

-b/o of 9 buds

-sold for level 7 max (clean but level still matters here)+5 buds: http://www.tf2outpost.com/trade/14763106

-7 buds

http://www.tf2outpost.com/trade/14689465

-b/o of 9 buds

-sold for misty beak=~6.5 buds in less than a day

http://www.tf2outpost.com/trade/14541724

-b/o of 11 buds

-sold for c9 fez+dp rebel+minor sweets=~7 buds as an estimate (unusuals are 6.9)

-notable offers:

cloudy merry=7.9

13th hour marauder+12 keys=7.3

smoking marauder (outdated)+g. fetti whoopee+smoking phantom+ks birdcage seen here: http://www.tf2outpost.com/user/76561198052257132,7 =6.8

declined 6 buds too low

http://www.tf2outpost.com/trade/14500973

-b/o of 8 buds

-sold for 6 buds, looks like an outlier, look at the ready offers above that and many rejecting 6 pure

-no notable offers

http://www.tf2outpost.com/trade/14067774

-sold for $265 presumably, don't really know how much that was but probably too high

-recent notable offers:

sulph ck (phos is 6.6 after overpay)

electrostatic swagman+misty vrh=6.6

6 buds rejected too low

a.f. hoodie+s. machina=7

c9 reggae=7.1 then

flies lid (outdated)=~7.2

c9 bubble pipe=8.3 outlier

http://www.tf2outpost.com/trade/11835403

-b/o of 8 buds

-sold for 7 buds+11 keys=~7.5 buds then, slightly older

http://www.tf2outpost.com/trade/14503641

-sold for steaming veil+pe blokes+1 bud+sf knife+bud in sweets=~7.2 buds

Current trades:

http://www.tf2outpost.com/trade/15816571

-notable offers:

misty belt+ks glove+collector phlog=close to ~7.5 I presume

http://www.tf2outpost.com/trade/15968069

-no notable offers

http://www.tf2outpost.com/trade/15654685

-b/o of 8 buds

-notable offers:

7 buds

burning slouch+ge whoopee (outdated) if he adds 1.5=~6.6

ge noir+pe batters+festives=6.5

burning private eye=~6.7

miami reggae if he adds 2=7.9

6, 6.5, 7, 7, 7.2, 7.5

Low end of 7 is from 2 sales and some offers. High end of 7.5 is from a slightly older sale and other offers too so all supported. I think 7.9 is kind of a little far off from the range along with b/os of 8 but anyway not much of a difference. 6.5 shouldn't be in the range, the sale was made in a day and that was the only offer made, he probably could have gotten more. Unusual overpay and original prices used.