barely Tightening the range

Sale 1:

Sold for Killstreak Aussie Stickybomb Launcher (16 at the time) + Collector’s Spec. KS Black Box (7?) + Pro. KS Rocket Launcher (7)

http://www.tf2outpost.com/trade/28310666 - B/O of 25

Seller: http://backpack.tf/profiles/76561198062425416#!/compare/1468281600/1468368000

Buyer: http://backpack.tf/profiles/76561198202018494#!/compare/1468281600/1468368000

X = 25 (Capped by B/O)

Sale 2:

Sold for 24 keys

http://www.tf2outpost.com/trade/28424682 - B/O of 24

Seller: http://backpack.tf/profiles/76561198021055079#!/compare/1471737600/1471824000

Buyer: http://backpack.tf/profiles/76561197960393800#!/compare/1471737600/1471824000

http://puu.sh/qJX8P/24abfcafbd.png

http://puu.sh/qJX9I/a5d1705234.jpg

Sale 3:

Sold with 5 keys + ~1 key in items for Max’s Head (23)

http://www.tf2outpost.com/trade/28368338 - B/O of 24

Seller: http://backpack.tf/profiles/76561198156315732#!/compare/1470009600/1470096000

Buyer: http://backpack.tf/profiles/76561198018945380#!/compare/1470009600/1470096000

X + 6 = 23

X = 17

Sale 4:

Quicksold-ish for 17 keys

http://www.tf2outpost.com/trade/28414361 - B/O of 17

Seller: http://backpack.tf/profiles/76561198043005666#!/compare/1471132800/1471219200

Buyer: http://backpack.tf/profiles/76561198021055079#!/compare/1471132800/1471219200

http://puu.sh/qJXcX/1ec8213d96.png

http://puu.sh/qJXdw/7e2c10a937.jpg

X = 17

Sale 5:

Quicksold for 11 keys + 4 gargoyle keys (4.4) + 11 ref (~0.5)

http://www.tf2outpost.com/trade/28412896 - No B/O

Seller: http://backpack.tf/profiles/76561198137768027#!/compare/1470960000/1471046400

Buyer: http://backpack.tf/profiles/76561198043005666#!/compare/1470960000/1471046400

X = 16

Sale 6:

Quicksold for 15 keys

http://www.tf2outpost.com/trade/28412823 - B/O of 15, declined 14

Seller: http://backpack.tf/profiles/76561198075376776#!/compare/1470960000/1471046400

Buyer: http://backpack.tf/profiles/76561198137768027#!/compare/1470960000/1471046400

X = 15

No current sellers

Buyer at 15 keys:

http://puu.sh/qJXm3/2744d786eb.png

Sales at:

15

16

17 (2x)

24

25

Sales less than 24 are too common to simply be excluded.

15 is too low, due to the buyer at 15 keys

Going to exclude 16, as it is the only sale, and it quicksold, as opposed to 17 keys having two sales, only one of them being a quicksale.

Going with 17-25