Proof below. 3 month-old price.

Essentially a reconfirmation of original price.

Sales:

http://www.tf2outpost.com/trade/15960524

-wanted ~19 keys

-sold for 1 bud (a few days after the trade)

-buyer's bp:

http://backpack.tf/id/76561197960777130?time=1385452800

http://backpack.tf/id/76561197960777130?time=1385625600

-19 keys then

http://www.tf2outpost.com/trade/15468249

-wanted a noir around 20 keys

-cosa+listed sweets bought blizz noir: http://www.tf2outpost.com/trade/15061924

-~1.1 buds which was 18 keys then, no overpay as offered

http://www.tf2outpost.com/trade/15217358

-b/o of 1.4 buds

-sold for bubbling aa=16 keys then

http://www.tf2outpost.com/trade/14877837

-bought o.f. counterfeit billy=14 keys, outlier

http://www.tf2outpost.com/trade/14914167

-sold for planets counterfeit billy+2 keys+g. shred=~18 keys

http://www.tf2outpost.com/trade/14735277

-wanted 20 keys

-sold/bought for smoking counterfeit billy: http://www.tf2outpost.com/trade/14720071

-19 keys

Current trades:

http://www.tf2outpost.com/trade/16032213

-would take ~19 keys, 1 week

-notable offers:

smoking noir=slightly above what seller would take so can only be considered as 19

o.f. beret+vintage merry=17

http://www.tf2outpost.com/trade/15220364

-wanted unusuals over ~19 keys

-notable offers:

11 keys+listed sweets=17

steaming aa=17

1 bud=17 then

stormy l'inspecteur=19

steaming fruit shoot=17

Sales: 14, 16, 18, 18, 19, 19

Key range since some sales are below 1 bud. 14 is an outlier and shouldn't be in range. Other than that, 16 keys wasn't a quicksell and most good offers reside around there so I'm using it as the low end. Most seem to be willing to take 19 keys, so along with sales and offers that's the high end. Unusual overpay and original prices used.