Proof below. 4 month-old price.

Sales:

http://www.tf2outpost.com/trade/15963825

-bought burning rack: http://www.tf2outpost.com/trade/16276997

-9.1 buds

-notable offers:

miami modest scrap (not sure but 9-10?)

10 buds offer could be fake

http://www.tf2outpost.com/trade/15277355

-ballcap+white bills+black eas bought a.f. tossle (unpriced): http://www.tf2outpost.com/trade/15184938

-bills: http://www.tf2outpost.com/trade/15349829

-eas: http://www.tf2outpost.com/trade/15280188

-notable offers:

miami sam=9.6

http://www.tf2outpost.com/trade/14325102

-wanted ~11.6 to ~12.8 buds

-ballcap+beams country (3.55) ( http://www.tf2outpost.com/trade/14850371 ) sold/bought for duped burning front runner (last priced 6 months ago 13-14 using dupes?): http://www.tf2outpost.com/trade/15268890

-very unclear+dupes used so not using, maybe 8-10

-notable offers:

10 buds+10 keys (collecting but retracted, he was never going to get it anyway, invalid)

http://www.tf2outpost.com/item/440,2120835076,617,5

-this ballcap sold for kaw ballcap (5.4)+sf scatter signed by epsilon scout (using normal price for this looking at his offer in the next sale)+1 bud

-8.7 buds

-ballcap: http://www.tf2outpost.com/trade/15629925

-scatter: http://www.tf2outpost.com/trade/15835591

http://www.tf2outpost.com/trade/15254494

-ballcap+s. pan bought harvest marauder: http://www.tf2outpost.com/trade/15161477

-~9.5 buds

-proof: http://backpack.tf/vote/id/528d3cb74dd7b835648b4568

http://www.tf2outpost.com/trade/14853937

-sold/bought for miami tossle: http://www.tf2outpost.com/trade/15021540 (this is the previous owner's trade where he sold his tossle for the ballcap buyer's kaw baker+searing bonk boy since he's not in history)

-~8.2 buds (I saw your warning woifi :P) I think this is a bit low, he had a much higher offer+this isn't exactly the clearest of sales

-notable offers:

blizz bonk boy+beams milkman=9.1

http://www.tf2outpost.com/trade/14849204

-bought duped burning phantom: http://www.tf2outpost.com/trade/14790266

-probably 9-10 buds

http://www.tf2outpost.com/trade/15895937

-b/o of 9 buds

-sold for c9 virus doctor (unpriced)+2 buds: http://backpack.tf/id/76561198044605707?time=1385280000

Current trades:

http://www.tf2outpost.com/trade/16189063

-no offers

http://www.tf2outpost.com/trade/16323455

-no notable offers in range

http://www.tf2outpost.com/trade/16076190

-wants 11 buds, 2 weeks

-no notable offers:

mem leak gibus (unpriced)=10-11?

http://www.tf2outpost.com/trade/15928617

-b/o of 12 buds, 3 weeks

-notable offers:

phos steel shako (3.9 outdated before overpay)+dp headsplitter+6 keys=9.7

miami impaler=no idea but high I suppose

Sales: 8.2, 8.7, 9.1, 9.5

Going with 9-10 instead of ~8 as low end since I only have one unclear piece of proof for the 8 and I still see quite some offers around 10, 8 could be a bit low. 9 is from sales around there and 10 is from a sale+offers that reach 10. Conservative bump down anyway. Unusual overpay and original prices used.