https://marketplace.tf/items/tf2/434;5;u9

https://backpack.tf/item/294651516

May 17 - $55.56 / $1.89 = 29.40 keys

https://backpack.tf/profiles/76561197995684708#!/compare/1588809600/1589068800

https://backpack.tf/profiles/76561198151592668#!/compare/1588809600/1588896000

Seems to be 30 keys leaving the 2nd compare

https://backpack.tf/profiles/76561198151592668#!/compare/1588896000/1589068800

https://backpack.tf/profiles/76561198167860331#!/compare/1583712000/1589241600

28 keys

https://backpack.tf/profiles/76561198192602363#!/compare/1588204800/1588291200

https://backpack.tf/profiles/76561198101838829#!/compare/1588291200/1588464000

29 keys

https://backpack.tf/profiles/76561198101838829#!/compare/1590710400/1590883200

https://backpack.tf/profiles/76561198007030589#!/compare/1590710400/1590969600

15 keys + Disco Beat Down Furious Fukaamigasa (16 keys) = 31 keys

https://backpack.tf/suggestion/5ea53bed216a84756a2f77a6

https://backpack.tf/profiles/76561198007030589#!/compare/1591401600/1591747200

https://backpack.tf/profiles/76561198292510319#!/compare/1591660800/1591747200

58 item stack, which is 33 keys and 25 refined

https://backpack.tf/profiles/76561198292510319#!/compare/1591747200/1591833600

https://backpack.tf/profiles/76561199015532580#!/compare/1591574400/1591747200

Untraceable

https://backpack.tf/profiles/76561199015532580#!/compare/1592438400/1592524800

https://backpack.tf/profiles/76561198453055175#!/compare/1592438400/1592524800

26 keys + 1.33 refined

https://backpack.tf/profiles/76561198453055175#!/compare/1592611200/1592697600

https://backpack.tf/profiles/76561198850178158#!/compare/1592611200/1592697600

Untraceable

https://backpack.tf/profiles/76561198850178158#!/compare/1593129600/1593216000

https://backpack.tf/profiles/76561198951414566#!/compare/1593043200/1593216000

Untraceable

https://backpack.tf/profiles/76561199004134126#!/compare/1587600000/1587945600

https://backpack.tf/profiles/76561198445063510#!/compare/1587600000/1587686400

Less than 10 keys of random items, low

https://backpack.tf/profiles/76561198445063510#!/compare/1587945600/1588032000

https://backpack.tf/profiles/76561198267189538#!/compare/1587945600/1588032000

Untraceable

https://backpack.tf/profiles/76561198267189538#!/compare/1592697600/1592784000

https://backpack.tf/profiles/76561198985910282#!/compare/1592697600/1592784000

28 keys and 37 refined

https://backpack.tf/profiles/76561198985910282#!/compare/1593475200/1593561600

https://backpack.tf/profiles/76561198055449744#!/compare/1593302400/1593993600

27 keys and 47 refined

https://backpack.tf/profiles/76561198267930919#!/compare/1587945600/1588032000

https://backpack.tf/profiles/76561198985910282#!/compare/1587945600/1588032000

Untraceable, 34 keys doesn't seem to match

https://backpack.tf/profiles/76561198337734785#!/compare/1590105600/1590192000

https://backpack.tf/profiles/76561198210678091#!/compare/1590105600/1590192000

Untraceable

https://backpack.tf/profiles/76561198210678091#!/compare/1590364800/1590537600

https://backpack.tf/profiles/76561198185241815#!/compare/1590364800/1590451200

Bulk

https://backpack.tf/profiles/76561198185241815#!/compare/1590451200/1590537600

https://backpack.tf/profiles/76561198305494036#!/compare/1590451200/1590537600

12 keys and 21 refined? Low

https://backpack.tf/profiles/76561198305494036#!/compare/1590451200/1590537600

https://backpack.tf/profiles/76561198202672367#!/compare/1590451200/1590537600

63 item stack, which is 28 keys and 35 refined

https://backpack.tf/profiles/76561198202672367#!/compare/1590537600/1590624000

https://backpack.tf/profiles/76561198097499917#!/compare/1590537600/1590624000

29 keys

https://backpack.tf/profiles/76561198232041512#!/compare/1590624000/1590710400

https://backpack.tf/profiles/76561198097499917#!/compare/1590624000/1590710400

Bulk

Sales:

26

28

28

29

29

29

29

29

30

31

34

https://gyazo.com/81d62e6803040652ceefc5db2d873a31

Buyers 24 keys

No current sellers

Going with 28-31, cutting off 26 and 34 just to tighten the range