Proof below. 6 month-old price.

Clean only (all on market are clean).

This is actually an increase from original suggested value.

Sales:

http://www.tf2outpost.com/trade/15660533

-b/o of 7 buds

-sold for demonflame ze goggles (unpriced)+8 keys+7 keys in items

-notable offers:

clean scorching spartan=6.1 (got one below)

http://www.tf2outpost.com/trade/15826548

-wanted 6 buds

-capo+logo trophy belt (1.45) in set+g. archimedes+5 keys bought duped burning capo (duped was ~7.6 looking at the last suggestion made with dupes many months ago): http://www.tf2outpost.com/trade/14457580

-5.3 buds (not using this but roughly around this value) (you would get 5.6 just subtracting 1 bud from the clean price of 8.9 for the duped capo)

-notable offers:

phos lucky shot (unpriced but could be close)

http://www.tf2outpost.com/trade/15861852

-b/o of 6.5 buds

-sold for what seems to be clean but long history scorching spartan=6.1 buds (dat upgrade)

-no notable offers apart from the same ones

Current trades:

http://www.tf2outpost.com/trade/16007390

-b/o of 7 buds, 1 week

-notable offers:

miami bunsen (unpriced but yet again probably fits)

miami tyro if seller adds 2=5.5

miami lucky shot (unpriced)

http://www.tf2outpost.com/trade/15938778

-has had it for few months now, longer than the trade

-no notable offers apart from the miami tyro-2 again

Not much proof for this, few sales. 5.5 is from the offer of miami tyro-2 and the rough value of the duped burning capo sale. 6.1 is from the sale of scorching spartan. Unusual overpay and original prices used.