None on the market, 2 sales have happened since last suggestion.

(1 is not identifable at all, brokerer's bp shows no change whatsoever in history and actual owner's bp was apparently private during that time)

http://www.tf2outpost.com/trade/10678306

Sold for 2 clean Haunted Scraps and 13 buds pure. (bp.tf history shows a slightly later date, so sale can't be seen there well)

http://www.tf2items.com/id/Neutron1?time=1368420160 and http://www.tf2items.com/id/Neutron1?time=1368451198

Can also be seen here: http://backpack.tf/id/76561198036116161?time=1368255600 and http://backpack.tf/id/76561198036116161?time=1368428400

(Jack Aubrey is apparently Toxins's alt)

Clean Haunted Metal is ~2.5-3.4

http://www.tf2outpost.com/trade/14471607 - B/o of 2.5

http://www.tf2outpost.com/trade/5857593 - Offer of a Burning Dixie (~3.4)

http://www.tf2outpost.com/trade/848007 - bought one for 3 pure

So 2(3*0.9)=5.4+13=18.4 buds

Flat price because only known sale in some time and in collector's bp, etc.