2 years

http://backpack.tf/profiles/76561198184776509#!/compare/1476662400/1476748800

Added Strange Specialized Killstreak Spy-cicle + 1 key for a Blizzardy Storm Reggaelator

= 17 keys

http://backpack.tf/profiles/76561198113270591#!/compare/1476835200/1476921600

= 18 keys

http://backpack.tf/profiles/76561198155033010#!/compare/1476748800/1476835200

= 16 keys

http://backpack.tf/profiles/76561198155033010#!/compare/1476921600/1477008000

History does not match up, maybe paypal or scm. Not using

http://backpack.tf/profiles/76561198184776509#!/compare/1476144000/1476230400

Can't use

http://backpack.tf/profiles/76561198074161948#!/compare/1475539200/1475625600

17 - 4 = 13 keys

http://i.imgur.com/3e6Ynt3.png = 1 key

http://i.imgur.com/bC0ITCS.png = 3 keys

http://imgur.com/a/Abne5 = 17 keys

http://backpack.tf/profiles/76561198275739386#!/compare/1475020800/1475107200

Sold with Genuine Professional Killstreak Huo-Long Heater for Max's Severed Head

22 - 1 = 21

http://imgur.com/a/LfV3g

http://backpack.tf/profiles/76561198074161948#!/compare/1475107200/1475366400

Paypal or scm, not using

http://backpack.tf/profiles/76561198163512540#!/compare/1474848000/1475107200

= 15 keys

http://imgur.com/a/RLTOU

http://backpack.tf/profiles/76561198163512540#!/compare/1474675200/1474761600

Bulk, can't use

http://backpack.tf/profiles/76561198031126990#!/compare/1474156800/1474243200

Bulk, can't use

http://backpack.tf/profiles/76561198031126990#!/compare/1473292800/1473724800

Paypal or SCM or somthing like that. OR HE GOT IT FOR FREE HAHAHHASHAHAAAA

http://backpack.tf/profiles/76561198085304767#!/compare/1470268800/1470355200

Sold for Terror-Watt Samur-Eye + key = 13 keys

Mini for EYE

http://backpack.tf/profiles/76561198206347444#!/compare/1474329600/1474502400

= 12, seems low

http://backpack.tf/profiles/76561198206347444#!/compare/1475020800/1475107200

19 - 2 = 17

Mini for Kill-a-Watt Backbiter's Billycock MINI

http://backpack.tf/profiles/76561198244380098#!/compare/1476576000/1476662400

12 keys

http://www.tf2outpost.com/trade/26973091

Quickbuyer at 12 keys.

http://prnt.sc/cxojfd

Quickbuyer at 13

Thanks spooky2me

21,18,17,16,15

Wow sales are all over the place...

Calling 21 as outlier. It is 3 keys from 18 while all other sales are 1,2 keys apart :3

Taking range of 13 - 18 here. Yes I know this is a very ugly range...