Once again, you need to link the marketplace.tf page - https://marketplace.tf/items/tf2/30809;5;u29

https://backpack.tf/profiles/76561198087057141#!/compare/1600214400/1600300800 - If you change the dates of sale 1 it shows you that for sure this is bulk.

https://backpack.tf/profiles/76561198030697131#!/compare/1600128000/1600300800 - Once again bulk

https://backpack.tf/profiles/76561198030697131#!/compare/1600041600/1600128000

https://backpack.tf/profiles/76561198357607771#!/compare/1600041600/1600300800 - once again bulk

https://backpack.tf/profiles/76561198850121720#!/compare/1602633600/1602720000 - Bulk

https://backpack.tf/profiles/76561198161159698#!/compare/1601769600/1601942400

https://backpack.tf/profiles/76561198832761255#!/compare/1601856000/1601942400 - untrace

https://backpack.tf/profiles/76561198049884052#!/compare/1600819200/1600905600 - chris told me he paid $20. which is the mp.tf you referenced

https://backpack.tf/profiles/76561198161159698#!/compare/1600646400/1601164800 - bulk

https://backpack.tf/profiles/76561198046272276#!/compare/1599350400/1599523200

https://backpack.tf/profiles/76561198049884052#!/compare/1599436800/1599523200 - finally bulk

I am guessing you excluded 16 keys due to unsolds - https://gyazo.com/d72e2407a844a588ff30b65e5bb5bb9b

Looks like this is fine but once again reasoning is important.