Resuggestion of https://backpack.tf/suggestion/5dc4a04867807217a4542ca4

Thanks to Vincentius for the info!

Sale #1 -

https://marketplace.tf/items/tf2/30316;5;u9 | https://backpack.tf/item/7654736811 | No b/o due to geel sale obv

$60.2 / $1.81 = 33.26 keys

Sale #2 - 33 keys

https://backpack.tf/profiles/76561198079275897#!/compare/1570233600/1570924800

https://backpack.tf/profiles/76561198002757046#!/compare/1570838400/1570924800

Sale #3 - HG Lid + Spooky Skullcracker + 11 keys

https://backpack.tf/profiles/76561198002757046#!/compare/1571788800/1571875200

https://backpack.tf/profiles/76561198145314530#!/compare/1571788800/1571875200

Square Mini:

https://backpack.tf/suggestion/5dd25045d38172253e005f82

Suggestion for 12.5 keys

Lid Mini:

https://backpack.tf/suggestion/5dd2400cd381721a25074d54

Lid might be higher,

https://i.gyazo.com/bff4977237c84d21c945148bacc07f11.png

however there was a buyer at 15 keys (recently hidden, methinks)

b/o was 37 - https://bot.tf/stats/listings/M0D9KR8V

would cap (15 + 12.5 + 11 = 37.5 keys)

Taking 33- 37 keys.