Sale 1:

https://backpack.tf/profiles/76561198261852808#!/compare/1590019200/1591056000

https://backpack.tf/profiles/76561197963500354#!/compare/1590019200/1591142400

Untrace

sale 2:

https://backpack.tf/profiles/76561198205254623#!/compare/1584662400/1584835200

https://backpack.tf/profiles/76561199005803152#!/compare/1584748800/1584835200

https://backpack.tf/profiles/76561198005032783#!/compare/1584748800/1584921600

Bulk / untrace

sale 3:

https://backpack.tf/profiles/76561198005032783#!/compare/1584748800/1584921600

https://backpack.tf/profiles/76561198046979223#!/compare/1584835200/1586649600

Untrace

sale 4:

https://backpack.tf/profiles/76561198112331037#!/compare/1587859200/1588636800

https://backpack.tf/profiles/76561198134689684#!/compare/1586908800/1591488000

Untrace

sale 5:

https://backpack.tf/profiles/76561198055622215#!/compare/1589846400/1589932800

https://backpack.tf/profiles/76561198244913000#!/compare/1589846400/1589932800

Bulk

sale 6:

https://backpack.tf/profiles/76561198244913000#!/compare/1590019200/1590278400

https://backpack.tf/profiles/76561198045551697#!/compare/1590019200/1590105600

https://backpack.tf/profiles/76561198036117453#!/compare/1590019200/1590105600

Untrace

sale 7:

https://backpack.tf/profiles/76561198036117453#!/compare/1590019200/1590105600

https://backpack.tf/profiles/76561198951414566#!/compare/1590019200/1590105600

Can trace 2 keys

sale 8:

https://backpack.tf/profiles/76561198951414566#!/compare/1590105600/1590278400

https://backpack.tf/profiles/76561197964195441#!/compare/1589932800/1590192000

Sold for keys?

sale 9:

https://backpack.tf/profiles/76561198368641361#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198431725617#!/compare/1585008000/1585094400

Untrace

sale 10:

https://backpack.tf/profiles/76561198431725617#!/compare/1585699200/1585785600

https://backpack.tf/profiles/76561198819747735#!/compare/1585612800/1585699200

Untrace / bulk

Sale 11:

https://backpack.tf/profiles/76561198819747735#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198431725617#!/compare/1586476800/1586563200

Bulk

sale 12:

https://backpack.tf/profiles/76561198097972401#!/compare/1586649600/1586822400

https://backpack.tf/profiles/76561198044157063#!/compare/1587081600/1587427200

Untrace / QS

sale 13:

https://backpack.tf/profiles/76561198044157063#!/compare/1588032000/1588118400

https://backpack.tf/profiles/76561198156315732#!/compare/1588032000/1588118400

Bulk

sale 14:

https://backpack.tf/profiles/76561198095817624#!/compare/1592438400/1592524800

https://backpack.tf/profiles/76561198026129220#!/compare/1592438400/1592524800

Bulk QS

sale 15:

https://backpack.tf/profiles/76561197970538347#!/compare/1587772800/1588291200

https://backpack.tf/profiles/76561198437236566#!/compare/1587254400/1589414400

Sold for 4 keys

Sale 16:

https://marketplace.tf/items/tf2/30843;5;u3030

$6.81 / $1.68 = 4.05 keys

$7.95 / $1.79 = 4.44 keys

$9.78 / $1.82 = 5.37 keys

$10.5 / $1.89 = 5.56 keys <--- https://backpack.tf/item/6253817924

$5.6 / $1.92 = 2.92 keys <--- https://backpack.tf/item/6408527328

$9.59 / $2.00 = 4.79 keys

$9.59 / $1.98 = 4.84 keys

$5.61 / $1.98 = 2.83 keys

Total sales @:

2.85, 2.90, 4, 4.05, 4.45, 4.80, 4.85, 5.35, 5.55 keys

buyers up to ~3.7 keys, 2 buyers at 4 keys,

calling 5.35 high,

4 low,

taking 4.05 - 4.85 keys