https://backpack.tf/item/4815607566

68 keys:

https://backpack.tf/profiles/76561199125443371#!/compare/1685145600/1685232000

https://backpack.tf/profiles/76561198849646740#!/compare/1684713600/1685232000

https://backpack.tf/item/3964669240

79 keys:

https://backpack.tf/profiles/76561198040073503#!/compare/1686787200/1686873600

https://backpack.tf/profiles/76561198052886184#!/compare/1686787200/1686960000

https://backpack.tf/item/9599366760 withdrawn from Scrap.tf storage

~~

https://marketplace.tf/items/tf2/1157;5;u3055

June 18: $149.99/2.001=74.95 ~75 keys

July 20: $149.99/1.959=76.56 ~76 keys

key prices https://marketplace.tf/items/tf2/5021;6

June 18 (1.99+2.03+2.02+2.02+1.99+1.98+1.98)/7=2.001

July 20 (1.97+1.97+1.97+1.95+1.95+1.95+1.95)/7=1.959

https://backpack.tf/item/8348215683 seller at 70 keys for 17 days

Although there's a seller at 70 keys, the majority of sales have happened above that price, including a pure sale being the highest.

Going to go with 68-79 keys for now but I'll change the range if the seller ages too much

Seller at 70 is still there, if it stays unsold for an other week I'll go with 68 flat