Resuggestion from https://backpack.tf/suggestion/5ffb14b1d165067f6b0b6659

https://marketplace.tf/items/tf2/30553;5;u9

Nov 13 - $90.99 / $1.79 = 50.83 keys https://backpack.tf/item/8206014625

Dec 24 - $100 / $2.10 = 47.62 keys https://backpack.tf/item/4988581906 46 key buyout https://gladiator.tf/listings/5fd9a219cb40971961ebad2a

https://backpack.tf/profiles/76561198072164101#!/compare/1602460800/1603584000

https://backpack.tf/profiles/76561198311498888#!/compare/1602460800/1602547200

Untraceable

https://backpack.tf/profiles/76561198311498888#!/compare/1608595200/1608681600

https://backpack.tf/profiles/76561198157836058#!/compare/1608508800/1608681600

Untraceable, the buyout seemed to be ~43.5

https://gyazo.com/a6ec6d7ca8f2f862b1d4c4cf41fb7e8c

https://gyazo.com/31f7b5d4537d46dad5fd0bb05c9bb850

https://backpack.tf/profiles/76561198157836058#!/compare/1608681600/1608854400

https://backpack.tf/profiles/76561198270949034#!/compare/1608681600/1608768000

Untraceable

https://backpack.tf/profiles/76561198270949034#!/compare/1608768000/1608854400

https://backpack.tf/profiles/76561198841365001#!/compare/1608768000/1608854400

Untraceable

https://backpack.tf/profiles/76561198841365001#!/compare/1608854400/1608940800

https://backpack.tf/profiles/76561198131633162#!/compare/1608681600/1608940800

Untraceable

https://backpack.tf/profiles/76561198356878131#!/compare/1604016000/1604188800

https://backpack.tf/profiles/76561198059874094#!/compare/1604102400/1604188800

Bulk

https://backpack.tf/profiles/76561198059874094#!/compare/1604188800/1604275200

https://backpack.tf/profiles/76561198080179568#!/compare/1604188800/1604275200

48 item stack, which is 35 keys and refined

https://backpack.tf/profiles/76561198251938010#!/compare/1606003200/1606089600

https://backpack.tf/profiles/76561198021055079#!/compare/1605916800/1606003200

Strange Blizzardy Razor Cut, better used there

https://backpack.tf/profiles/76561198021055079#!/compare/1607299200/1607385600

https://backpack.tf/profiles/76561198068301322#!/compare/1606953600/1607385600

13 keys + DBD Galvanized Gibus (32 keys) https://backpack.tf/suggestion/5fea2e6a92e61f24b57af7f7

Sale = 45 keys

https://backpack.tf/profiles/76561198053252981#!/compare/1604188800/1604448000

https://backpack.tf/profiles/76561198226596840#!/compare/1604102400/1604361600

Untraceable

https://backpack.tf/profiles/76561198226596840#!/compare/1607731200/1607990400

https://backpack.tf/profiles/76561198002186909#!/compare/1607644800/1607731200

41 keys + refined

https://backpack.tf/profiles/76561198002186909#!/compare/1607990400/1608076800

https://backpack.tf/profiles/76561198270949034#!/compare/1608681600/1608768000

This is the December 24 Marketplace sale

https://backpack.tf/item/4988581906

I skip all tradebacks

https://backpack.tf/profiles/76561198986747837#!/compare/1608854400/1608940800

https://backpack.tf/profiles/76561198148495750#!/compare/1608854400/1608940800

Untraceable

Sales:

35

41

43.5?

45

46

51

Classifieds:

https://gyazo.com/4c78dc9dd32015cc4eea5eaa38a9bdaf

2 weeks at 45

2 months at 55

https://marketplace.tf/items/tf2/30553;5;u9

$99.99, which is approximately 47 keys

41-46