Re-suggesting, something odd happened and all suggestions for this were automatically closed.

Sales

http://www.tf2outpost.com/trade/17144182 ~19 keys

O. Fire Ol' Geezer (~15 keys) + F. Rocket Launcher + 1 key

http://backpack.tf/id/76561198047873204?time=1389340800

http://backpack.tf/id/76561198047873204?time=1389427200

http://www.tf2outpost.com/trade/17117554 >15 keys

(history not available - was sold for pure, though)

http://www.tf2outpost.com/trade/17070260 ~1.5 buds

Stormy Fukaamigasa (~1.2 buds) + S. Original + 2 keys

http://www.tf2outpost.com/trade/17049359 ~2.1 buds

Added 4 keys for an O. Planets Blighted Beak (~2.3 buds)

http://www.tf2outpost.com/trade/17022645 1 bud

http://backpack.tf/id/76561198047566698?time=1388822400

http://backpack.tf/id/76561198047566698?time=1388908800

Keys were not included in the transaction and have a diferent origin.

http://www.tf2outpost.com/trade/17027234 22 keys

http://backpack.tf/id/76561198013747456?time=1388908800

http://backpack.tf/id/76561198013747456?time=1388995200

http://www.tf2outpost.com/trade/17013990 20 keys

http://backpack.tf/id/76561198046812638?time=1388908800

http://backpack.tf/id/76561198046812638?time=1388995200

http://www.tf2outpost.com/trade/17006996 ~19 keys

Blizzardy Carouser's Capotain (~19 keys)

http://www.tf2outpost.com/trade/17002505 15 keys

http://www.tf2outpost.com/trade/17004762 ~19 keys

B.M.O.C. + 6 keys

http://www.tf2outpost.com/trade/16920813 20 keys

Never sold (trade was closed, though), but offered buyout several times.

http://www.tf2outpost.com/trade/16826140 ~1.4 buds

Bud + black Bill's

http://backpack.tf/id/76561198042034995?time=1387094400

http://backpack.tf/id/76561198042034995?time=1388390400

http://www.tf2outpost.com/trade/16810702 18 keys

http://backpack.tf/id/76561198071693266?time=1388390400

http://backpack.tf/id/76561198071693266?time=1388476800

http://www.tf2outpost.com/trade/16790422 1 bud

http://www.tf2outpost.com/trade/16782147 N/A

7 craft #d Breather Bags lol

http://backpack.tf/id/76561198057259404?time=1388304000

http://backpack.tf/id/76561198057259404?time=1388390400

http://www.tf2outpost.com/trade/16774725 1.3 buds(?)

1 bud + 6 keys, was offered. No trace of the actual sale, though.

Sales (in keys):

15 - 15 - 18 - 19 - 19 - 19 - 20 - 20 - 20 - 20 - 22 - 25 - 27 - 29 - 40

Most are within the range, others are outliers (either quicksells or overpays)

Selling:

http://www.tf2outpost.com/trade/16756770 - 2 buds, was willing to sell for 1.2 but was retracted.

http://www.tf2outpost.com/trade/16845870 - 1.4 "quicksell" - no interest after over a week, was offered 1.3 tho

http://www.tf2outpost.com/trade/17059564 - Offered 18 keys + items from dishonored (unpriced)

http://www.tf2outpost.com/trade/17065164 - 1.3

http://www.tf2outpost.com/trade/17069562 - 1.3

http://www.tf2outpost.com/trade/17098999 - Offered 22 keys, willing to take 1.2 buds

http://www.tf2outpost.com/trade/17109383 - 1.3 buds, willing buyer

http://www.tf2outpost.com/trade/17103555 - Offered an O. Fire Fez (~1.3 buds)

http://www.tf2outpost.com/trade/17115127 - No offers

http://www.tf2outpost.com/trade/17117447 - 1.3

http://www.tf2outpost.com/trade/17118213 - 1.1 buds

http://www.tf2outpost.com/trade/17122325 - 1 bud

http://www.tf2outpost.com/trade/17130306 - 21 keys

http://www.tf2outpost.com/trade/17130867 - 1.5, no offers

http://www.tf2outpost.com/trade/17137244 - 1.5, no offers