Sale 1:

https://backpack.tf/profiles/76561198323281330#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561197978500506#!/compare/1565913600/1566000000

Untrace / keys?

Sale 2:

https://backpack.tf/profiles/76561197978500506#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198106869848#!/compare/1565913600/1566000000

Sold for 10 keys

Sale 3:

https://backpack.tf/profiles/76561198106869848#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198856915595#!/compare/1566000000/1566086400

Sold for 10 keys

Sale 4:

https://backpack.tf/profiles/76561198856915595#!/compare/1566086400/1566172800

https://backpack.tf/profiles/76561198317877042#!/compare/1566086400/1566172800

Sold for TW Western

use there

Sale 5:

https://backpack.tf/profiles/76561198317877042#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198097844326#!/compare/1566172800/1566259200

Sold for Blizzardy Hedge

Sale 6:

https://backpack.tf/profiles/76561198097844326#!/compare/1566432000/1566518400

https://backpack.tf/profiles/76561198278463603#!/compare/1566432000/1566518400

Bulky

Sale 7:

https://backpack.tf/profiles/76561198278463603#!/compare/1567296000/1567382400

https://backpack.tf/profiles/76561198027551637#!/compare/1567296000/1567382400

Sold for 10 keys

Sale 8:

https://backpack.tf/profiles/76561198363395191#!/compare/1571356800/1571443200

https://backpack.tf/profiles/76561198073053469#!/compare/1571011200/1571443200

Sold for 11 keys

Sale 9:

https://backpack.tf/profiles/76561198101915413#!/compare/1569542400/1569628800

https://backpack.tf/profiles/76561198048851745#!/compare/1569542400/1569628800

QS

Sale 10:

https://backpack.tf/profiles/76561198048851745#!/compare/1569542400/1569628800

https://backpack.tf/profiles/76561198156769992#!/compare/1568937600/1569628800

Sold for ~9.5 keys

Sale 11:

https://backpack.tf/profiles/76561198156769992#!/compare/1571616000/1571702400

https://backpack.tf/profiles/76561198080179568#!/compare/1571616000/1571702400

QS

Sale 12:

https://backpack.tf/profiles/76561198093255661#!/compare/1567728000/1568073600

https://backpack.tf/profiles/76561198977380791#!/compare/1572220800/1573257600

Untrace

Sale 13:

https://backpack.tf/profiles/76561198367981761#!/compare/1566000000/1567123200

https://backpack.tf/profiles/76561198420546179#!/compare/1568678400/1568937600

Untrace

sale 14:

https://backpack.tf/profiles/76561198420546179#!/compare/1569369600/1573344000

https://backpack.tf/profiles/76561198002757046#!/compare/1569456000/1569542400

QS

sale 15:

https://backpack.tf/profiles/76561198002757046#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198208567283#!/compare/1569715200/1570147200

Sold for C9 Ketche + ~3 keys in sweets

use there

Sale 16:

https://backpack.tf/profiles/76561198208567283#!/compare/1571616000/1572307200

https://backpack.tf/profiles/76561198306756308#!/compare/1571961600/1572134400

Sold with negligible sweets for CTFL Billy

Billy Mini:

https://backpack.tf/suggestion/5da79d6f6780722c0331cb32

Suggestion for 16 keys

Sale 17:

https://backpack.tf/profiles/76561198396576035#!/compare/1567814400/1567987200

https://backpack.tf/profiles/76561198160120451#!/compare/1567900800/1567987200

Bulky

Sale 18:

https://backpack.tf/profiles/76561198293654690#!/compare/1565654400/1566000000

https://backpack.tf/profiles/76561198334598690#!/compare/1565913600/1566000000

QS

Sale 19:

https://backpack.tf/profiles/76561198334598690#!/compare/1566259200/1566345600

https://backpack.tf/profiles/76561198144294773#!/compare/1566345600/1566518400

Sold for 14 keys

Sale 20:

https://backpack.tf/profiles/76561198337734785#!/compare/1570060800/1570147200

https://backpack.tf/profiles/76561198169000533#!/compare/1570060800/1570579200

Untrace

Sale 21:

https://backpack.tf/profiles/76561198045775820#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198336898193#!/compare/1569110400/1570492800

Untrace

Sale 22:

https://backpack.tf/profiles/76561198336898193#!/compare/1572220800/1572566400

https://backpack.tf/profiles/76561198114402400#!/compare/1572480000/1572566400

Bulky

Sale 23:

https://backpack.tf/profiles/76561198123378599#!/compare/1565827200/1566000000

https://backpack.tf/profiles/76561198337734785#!/compare/1565913600/1566000000

QS

Sale 24:

https://backpack.tf/profiles/76561198337734785#!/compare/1566259200/1566345600

https://backpack.tf/profiles/76561198151719545#!/compare/1566259200/1566345600

Keys

Sale 25:

https://backpack.tf/profiles/76561198151719545#!/compare/1568160000/1568505600

https://backpack.tf/profiles/76561198828257151#!/compare/1568419200/1568419200

https://backpack.tf/profiles/76561197972388392#!/compare/1541462400/1570665600

Untrace

Sale 26:

https://marketplace.tf/items/tf2/30123;5;u56

$18 / $1.82 = 9.89 keys

$25.99 / $1.82 = 14.28 keys

Total sales @:

9.5, 9.89, 10, 10, 10, 11, 14, 14.28, 16 keys

https://i.imgur.com/gIU6zH8.png

poorly bumped sellers for 12, 13 keys,

aging unsold for 13 keys,

newish seller for 15 keys,

buyers up to ~8.5 keys,

calling 16 high,

taking 10 - 14 keys, conserving close to unsolds.