Sale 1:

https://backpack.tf/profiles/76561198064646061#!/compare/1545782400/1545868800

https://backpack.tf/profiles/76561198156255538#!/compare/1545782400/1545868800

Sold for 42 keys

Sale 2:

https://backpack.tf/profiles/76561198028562665#!/compare/1542240000/1542326400

https://backpack.tf/profiles/76561198125791160#!/compare/1542240000/1542326400

Keys

Sale 3:

https://backpack.tf/profiles/76561198125791160#!/compare/1546041600/1546128000

https://backpack.tf/profiles/76561198122051953#!/compare/1546128000/1546214400

Sold for OF Gibus + 8 keys

Sale 4:

https://backpack.tf/profiles/76561198079639899#!/compare/1543881600/1543968000

Sold for Scorching Warhood

Use there

Sale 5:

https://backpack.tf/profiles/76561198080678983#!/compare/1541030400/1541116800

https://backpack.tf/profiles/76561198316071886#!/compare/1541116800/1541289600

Untrace

Sale 6:

https://backpack.tf/profiles/76561198195641143#!/compare/1540512000/1541116800

Untrace

Sale 7:

https://backpack.tf/profiles/76561198054295558#!/compare/1540598400/1540944000

Sold for 49 keys

Sale 8:

https://backpack.tf/profiles/76561198050062763#!/compare/1541894400/1541980800

https://backpack.tf/profiles/76561198052665106#!/compare/1541808000/1541980800

Sold for Eldritch Tanker

Sale 9:

https://backpack.tf/profiles/76561198260467278#!/compare/1541030400/1541116800

https://backpack.tf/profiles/76561198068090261#!/compare/1541030400/1541116800

Sold for keys, high.

Sale 10:

https://backpack.tf/profiles/76561198068090261#!/compare/1542153600/1542240000

https://backpack.tf/profiles/76561198829491565#!/compare/1542153600/1542240000

https://backpack.tf/profiles/76561198189205206#!/compare/1542931200/1544140800

Untrace

Sale 11:

https://backpack.tf/profiles/76561198189205206#!/compare/1545177600/1545350400

QS?

Sale 12:

https://backpack.tf/profiles/76561198278678961#!/compare/1545523200/1545868800

https://backpack.tf/profiles/76561198112516663#!/compare/1545782400/1545868800

Sold for 25 keys

Sale 13:

https://backpack.tf/profiles/76561198112516663#!/compare/1545868800/1545955200

https://backpack.tf/profiles/76561198153511702#!/compare/1545868800/1545955200

Sold for Misty Toque + ~25 keys in sweets

Toque Mini:

https://backpack.tf/suggestion/5c3108b244325a12ee46e0b6

Suggestion for 41.5 keys

Total is 66.5 keys

Sale 14:

https://backpack.tf/profiles/76561198153511702#!/compare/1545868800/1545955200

https://backpack.tf/profiles/76561198170034350#!/compare/1545868800/1545955200

Sold with Planets Buzz for CV Scopers

Use there.

Sale 15:

https://backpack.tf/profiles/76561198170034350#!/compare/1545955200/1546041600

https://backpack.tf/profiles/76561198227756380#!/compare/1543449600/1546128000

Sold with Aussie Minigun for Strange Cool FT Minigun

Use there.

Sale 16:

https://backpack.tf/profiles/76561198006981147#!/compare/1541030400/1541116800

https://backpack.tf/profiles/76561198046178525#!/compare/1540944000/1541203200

Sold for Opening Tanker + ~6 keys in sweets

Sale 17:

https://backpack.tf/profiles/76561198142892266#!/compare/1541548800/1541635200

https://backpack.tf/profiles/76561198046178525#!/compare/1541635200/1541721600

Sold with ~23 keys in sweets for Opening Handcraft

Sale 18:

https://backpack.tf/profiles/76561198342161127#!/compare/1542758400/1542844800

Untrace

Sale 19:

https://backpack.tf/profiles/76561198342161127#!/compare/1542844800/1542931200

https://backpack.tf/profiles/76561198163207749#!/compare/1539907200/1545091200

Untrace

Sale 20:

https://backpack.tf/profiles/76561198247733854#!/compare/1540684800/1540857600

https://backpack.tf/profiles/76561198122107265#!/compare/1540771200/1540857600

Sold for 55 keys

Sale 21:

https://backpack.tf/profiles/76561198122107265#!/compare/1540857600/1540944000

Use there.

Sale 22:

https://backpack.tf/profiles/76561198130948401#!/compare/1544918400/1545004800

https://backpack.tf/profiles/76561198175420885#!/compare/1544745600/1544918400

Bulky?

Sale 23:

https://backpack.tf/profiles/76561198175420885#!/compare/1544918400/1545004800

https://backpack.tf/profiles/76561198267364698#!/compare/1544918400/1545004800

Sold with 3 keys for Ghastly Slo-Poke

Poke Mini:

https://backpack.tf/suggestion/5c22c679cf6c7556f92b388a

Suggestion for 76 keys

Total is 73 keys

Sale 24:

https://backpack.tf/profiles/76561198267364698#!/compare/1545177600/1545264000

https://backpack.tf/profiles/76561198059334336#!/compare/1545264000/1545350400

Sold for Steaming Mohawk(34.5) + Stormy Brain Bowl

Sale 25:

https://backpack.tf/profiles/76561198059334336#!/compare/1546041600/1546128000

https://backpack.tf/profiles/76561198202299969#!/compare/1546041600/1546128000

Bulky

Sale 26:

https://backpack.tf/profiles/76561198326511775#!/compare/1541721600/1541894400

https://backpack.tf/profiles/76561198202135278#!/compare/1541721600/1541980800

Sold for ~60 keys in Aussies

Sale 27:

https://backpack.tf/profiles/76561198202135278#!/compare/1541721600/1541980800

https://backpack.tf/profiles/76561198281398809#!/compare/1541808000/1541980800

TOO DAMN HIGH

Sale 28:

https://backpack.tf/profiles/76561198281398809#!/compare/1542326400/1542412800

https://backpack.tf/profiles/76561198105071091#!/compare/1542240000/1542326400

Sold for P Fetti Caribou + DP Woodsman + 5 keys

Sale 29:

https://backpack.tf/profiles/76561198105071091#!/compare/1542240000/1542326400

https://backpack.tf/profiles/76561198260651036#!/compare/1542326400/1542412800

Sold for Doorway Tanker

Sale 30 - 32:

https://marketplace.tf/items/31002;5;u114

Sold for 210, 154.64, 154.64 USD

Keys at 1.76, 1.76, 1.77 USD

Totals are 119.32, 87.36, 87.37 keys

Total sales @:

25, 42, 49, 55, 60, 73, 87.36, 87.37, 119.32 keys

Buyers up to 33 keys,

Sellers at 60 keys,

Gonna make the argument that taking 42 - 60 keys would cover any sale above, with most being inrange or high.