Sale 1:

Sold for 25 keys

http://www.tf2outpost.com/trade/28000352 - No visible B/O, shouldn’t matter though

Seller: http://backpack.tf/profiles/76561198090956917#!/compare/1460419200/1460505600

Buyer: http://backpack.tf/profiles/76561198121990251#!/compare/1460505600/1460592000

X = 25

Sale 2:

Sold for Strange Pro. KS Festive Rocket Launcher (trade hold)

http://www.tf2outpost.com/trade/27935766 - B/O of 25

Seller: http://backpack.tf/profiles/76561198132800653#!/compare/1457856000/1458864000

Buyer: http://backpack.tf/profiles/76561198139966666#!/compare/1457769600/1458864000

X = 25 (Capped by B/O)

Sale 3:

Sold for Blizzardy Noble

http://www.tf2outpost.com/trade/28082030 - No B/O

Seller: http://backpack.tf/profiles/76561198053967778#!/compare/1461542400/1461628800

Buyer: http://backpack.tf/profiles/76561198127557045#!/compare/1457769600/1461974400

X = 25

Sale 4:

Sold with ~1 key in items for Abduction Universal Translator (Pre-all-class hype)

http://www.tf2outpost.com/trade/28078209 - B/O of 22

Seller: http://backpack.tf/profiles/76561198121990251#!/compare/1460764800/1460937600

Buyer: http://backpack.tf/profiles/76561198053967778#!/compare/1460419200/1460851200

X + 1 = 21

X = 20

Sale 5:

Sold in ~1 day for 19 keys

No outpost

Seller: http://backpack.tf/profiles/76561198085351986#!/compare/1456819200/1456905600

Buyer: http://backpack.tf/profiles/76561198059105736#!/compare/1456732800/1456819200

X = 19

Sale 6:

Sold for 19 keys

http://www.tf2outpost.com/trade/28136868 - B/O of 19

Seller: http://backpack.tf/profiles/76561198085691904#!/compare/1462579200/1462752000

Buyer: http://backpack.tf/profiles/76561198043064953#!/compare/1462665600/1462752000

X = 19

Sale 7:

Sold for 19 keys (and a conjurer’s cowl)

No outpost

Seller: http://backpack.tf/profiles/76561198176814243#!/compare/1463270400/1463356800

Buyer: http://backpack.tf/profiles/76561198086990597#!/compare/1463270400/1463356800

X = 19

Sale 8:

Sold for 14 keys?

http://www.tf2outpost.com/trade/28116389 - B/O of 23

Seller: http://backpack.tf/profiles/76561198127557045#!/compare/1462320000/1462579200

Buyer: http://backpack.tf/profiles/76561198085691904#!/compare/1462233600/1462320000

X = 14

Sale 9:

Sold for Cloud 9 Hive Minder

http://www.tf2outpost.com/trade/27927024 - B/O of 23

Seller: http://backpack.tf/profiles/76561198159661472#!/compare/1458025200/1458198000

Buyer: http://backpack.tf/profiles/76561198208529727#!/compare/1458198000/1458284400

No other sales on the Hive Minder, should be used to update it instead

Sale 10:

Sold with ~3 keys in items for Logo Flipped Trilby

No outpost

Seller: http://backpack.tf/profiles/76561198099292422#!/compare/1457251200/1457424000

Buyer: http://backpack.tf/profiles/76561198159661472#!/compare/1456992000/1457251200

Would rather have this sale be used to update the Trilby

Sellers:

23 keys:

http://www.tf2outpost.com/trade/28178018 - 4 days, declined 20 pure

28 keys:

http://puu.sh/p1No1/2f5b78e879.png

30 keys:

http://www.tf2outpost.com/trade/28157590 - 1 week, declined 20 pure + adds?

http://puu.sh/p1Nt7/0c57a3147f.png - 9 days

Sales at:

25

25

25

20

19

19

19

14

14 is obviously an outlier

Not sure if I should exclude 19 keys from the range or not. There are 3 sales at 19 and a sale at 20, which make it seem like a common trading point.

Going with 19-25