I've been told that 9 was an outlier

5 month old price

Classifieds at the time of the suggestion:

[url]http://screencast.com/t/FXwIXrlPo8pI[/url] QS

Sellers:

[url]http://www.tf2outpost.com/trade/23320313[/url] 12 keys 3 ref

[url]http://www.tf2outpost.com/trade/23272912[/url] 14 keys

[url]http://www.tf2outpost.com/trade/22577988[/url] 14 keys

Sold #1

[url]http://www.tf2outpost.com/trade/23182796[/url] Sold for 8 Mann Co. Supply Crate Keys + 3 Non-Craftable Limited Late Summer Crate Keys (1.2 keys at the time) + 5 ref = 109.4 ref (at the time)

109.4/9 = 12.16 keys

I'm rounding to 12 keys

Sold #2

[url]http://www.tf2outpost.com/trade/23202607[/url] Sold for 10 keys

Before: [url]http://backpack.tf/profiles/76561198090868814?time=1414134000[/url]

After: [url]http://backpack.tf/profiles/76561198090868814?time=1414220400[/url]

Sold #3

Before:

[url]http://backpack.tf/profiles/76561198110951310?time=1413442800[/url]

After:

[url]http://backpack.tf/profiles/76561198110951310?time=1413529200[/url]

Sold for 9 keys

Sold #4

[url]http://www.tf2outpost.com/trade/23148245[/url] Bought a Nuts'n Bolts Fancy Fedora (1.1 buds at the time) for his Bill's Hat (5 keys at the time) + Smoking Helmet Without a Home (14 keys)

17.9 - 5 = 12.9

12.9 * .9 = 11.6 keys

Any feedback would be appreciated!