https://marketplace.tf/items/339;5;u29

~35 keys, qs

https://backpack.tf/profiles/76561198077338856#!/compare/1519948800/1520035200

49 keys "qs" (rack doesn't appear here, chump traded too fast)

https://backpack.tf/profiles/76561198050062763#!/compare/1519862400/1520035200

Phosp Pot (45) + ~18 keys of sweets = 63 keys

https://backpack.tf/profiles/76561198141390221#!/compare/1523750400/1523836800

48 keys "qs"

https://backpack.tf/profiles/76561198219980724#!/compare/1525132800/1525219200

49 keys "qs"

https://backpack.tf/profiles/76561198050062763#!/compare/1520208000/1520294400

Blizz YWN (unsold @19.5: https://imgur.com/R7Ss9jp ) + DBD Scotch Bonnet (25) + SS Crasher (17) + 2 keys in sweets = 64 keys

https://backpack.tf/profiles/76561198107383449#!/compare/1523491200/1523577600

51 keys "qs"

https://backpack.tf/profiles/76561198056531196#!/compare/1523577600/1523664000

47 keys "qs"

https://backpack.tf/profiles/76561198073438708#!/compare/1522281600/1522368000

Bulk

https://backpack.tf/profiles/76561198309838525#!/compare/1522108800/1522195200

Better here

https://backpack.tf/profiles/76561198129205357#!/compare/1521936000/1522108800

Low

https://backpack.tf/profiles/76561198079764636#!/compare/1520985600/1521072000

?

https://backpack.tf/profiles/76561198093573384#!/compare/1520899200/1520985600

Bulk

https://backpack.tf/profiles/76561198050062763#!/compare/1519776000/1519862400

Will fit in range

https://backpack.tf/profiles/76561198259205715#!/compare/1521590400/1521676800

Searing Festive Tree? Low

https://backpack.tf/profiles/76561198139171368#!/compare/1521244800/1521331200

?

https://backpack.tf/profiles/76561198050930436#!/compare/1520467200/1520812800

Cauldron Bubbles Samur + 5 keys = better here

https://backpack.tf/profiles/76561198024925599#!/compare/1520294400/1520380800

Bulk

https://backpack.tf/profiles/76561198100477765#!/compare/1523923200/1524096000

https://backpack.tf/profiles/76561198344933095#!/compare/1524009600/1524096000

?

https://backpack.tf/profiles/76561198151546362#!/compare/1520553600/1520640000

https://backpack.tf/profiles/76561198344933095#!/compare/1520553600/1520640000

?

https://backpack.tf/profiles/76561198084997039#!/compare/1523491200/1523577600

Bulk

https://backpack.tf/profiles/76561198028243021#!/compare/1520294400/1522368000

?

https://backpack.tf/profiles/76561198312583107#!/compare/1519948800/1520035200

?

https://backpack.tf/profiles/76561198108003244#!/compare/1524960000/1525046400

Bulk

https://backpack.tf/profiles/76561198131633162#!/compare/1524700800/1524787200

Mini on taunt: https://marketplace.tf/items/30615;5;u3013 - 20 keys

This' low even if full sugg on taunt will be around 25

https://backpack.tf/profiles/76561198069559160#!/compare/1523664000/1523750400

Bulk

https://backpack.tf/profiles/76561198100309587#!/compare/1520812800/1520899200

https://backpack.tf/profiles/76561198344933095#!/compare/1520812800/1520899200

Prolly sold Guardian and used keys to buy Rack? Untrac

https://backpack.tf/profiles/76561198054198170#!/compare/1524182400/1524268800

Only sale on RL

https://backpack.tf/profiles/76561198054198170#!/compare/1524009600/1524096000

https://backpack.tf/profiles/76561198197324337#!/compare/1523923200/1524009600

Better use it here

Summary

Sales @47, 48, 49 (x2), 51, 63, 64

Current sellers: https://imgur.com/ntRjC7i

Previous sellers: https://imgur.com/pt7IHGH

Taking previous sellers (some unsolds at 50 for several days) and current sellers, I'd call every "qs" in this sugg as a common trading point and go with 47-64