resuggesting

Sale 1: (outlier, sold within a day)

Sold for 5 buds + 57 keys = 5 + 3 = 8

http://www.tf2outpost.com/trade/22279644

http://i.imgur.com/RvsWuoh.jpg

Sale 2: (credits to 'epic heavy' for the proof!)

Sold for Burning Hound Dog (8.5*0.9) + B.M.O.C ([12/19]*0.9) + Bill's Hat ([6/19]) + *Strange Professional Ambassador ([10/19]*0.9) = 7.65 + 0.568 + 0.316 + 0.474 = 9.008 (rounding to 9)

http://www.tf2outpost.com/trade/22297504

http://i.imgur.com/TpCPV4o.png

Sale 3: (not too sure about this sale, owner didn't want to part with his trade): http://i.imgur.com/BoG64ES.png

(according to backpack.tf history) Sold for 2 buds (2) + 18 keys (~0.95) + Cauldron Bubbles Milkman (3.1*0.9) + Latern Flipped Trilby (3*0.9) = 2 + 0.95 + 2.79 + 2.7 = 8.44 (rounding to 8.4)

http://www.tf2outpost.com/trade/22321225

http://backpack.tf/profiles/76561198125791160?time=1409468400 → http://backpack.tf/profiles/76561197975857835?time=1409468400

Mini for Strange Professional Ambassador:

(Taking recent sales from SCM)

$20.66 = ~8.7 keys

$19.52 = ~8.2 keys

$27.25 = ~11.7 keys

$26.97 = ~11.3 keys

$23.87 = ~ 10.0 keys

$24.40 = ~10.3 keys

$9.20 = ~3.9 keys (outlier)

$22.50 = ~9.5 keys

$19.82 = ~8.3 keys

Taking ~10 keys as average price.

Notes:

Currently one on the market, 1/4 in existence.

Feel free to support/counter my suggestion!