Well, this already needs a rework

Sale #1 - https://marketplace.tf/items/337;5;u66 / https://backpack.tf/item/2883782618

61.66 / 1.79 = 34.44 keys

Sale #1.5 - https://marketplace.tf/items/337;5;u66 (Now Outdated)

55.89 / 1.81 = 30.878 keys

Sale #2 - Orb Fire Shako + KaW Nickel + 3 keys

https://backpack.tf/profiles/76561198047988243#!/compare/1551225600/1551398400

https://backpack.tf/profiles/76561198226262240#!/compare/1551312000/1551398400

Taking 14 + ? + 3 = ?

Shako Mini - https://backpack.tf/suggestion/5cc7c459d381726afb5926e1

Taking 14 keys

Nickel Mini - (No Usable Mini)

Sale #3 - 24 keys + 45 ref

https://backpack.tf/profiles/76561198226262240#!/compare/1551398400/1551484800

https://backpack.tf/profiles/76561198824740252#!/compare/1551398400/1551484800

Sale #4 - Tesla Hotrod + 586.66 ref in item sweets (Use There)

https://backpack.tf/profiles/76561198824740252#!/compare/1551484800/1551571200

https://backpack.tf/profiles/76561197994783413#!/compare/1551484800/1551571200

(no usable mini) Only "sale" is 1 for 1 with a vivid plug ( https://backpack.tf/profiles/76561198128803606#!/compare/1551571200/1551657600 ) , given that the plug has no "valid" sales other then an auction that could have had more involved. The plug sold 1 for 1 in auction for a hg tyro

https://backpack.tf/profiles/76561198126985956#!/compare/1551484800/1551657600

https://backpack.tf/profiles/76561198824740252#!/compare/1551571200/1551657600

Given that soon after it sold for the tyro, the buyer sold for far less

( https://backpack.tf/profiles/76561198126985956#!/compare/1551657600/1551744000 )

Given the factors of plug, imo its best to exclude.

Sale #5 - 40 keys

https://backpack.tf/profiles/76561198040186479#!/compare/1557619200/1557705600

https://backpack.tf/profiles/76561198402009056#!/compare/1557619200/1557705600

Overall Taking 34 - 40 keys

(excluding sale #3 due to probably being a quicksell given that buyers were at 25 / 26 keys during the time of that sale)

https://bot.tf/stats/listings/4Z10EVXY

https://bot.tf/stats/listings/4W8ROE7M