Item 1: https://backpack.tf/item/9576421913

Sale 1:

https://backpack.tf/profiles/76561199697394581#!/compare/1775692800/1775779200

https://backpack.tf/profiles/76561198135576475#!/compare/1775606400/1775779200

9 keys

Item 2: https://backpack.tf/item/9538634754

Listed on bot

Sales:

9

Sellers:

BPTF - https://imgur.com/9FHI4PE 10 keys and up

MPTF - https://marketplace.tf/items/tf2/31160;5;u3070 $24.99 (~13.5 keys)

STN - https://stntrading.eu/item/tf2/Unusual+Aurora+Borealis+Taunt%3A+Texas+Truckin%27 noen

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Texas%20Truckin%27?appid=440&q=Aurora+Borealis 17.51€ (~9 keys with keys at 1.95€)

Going with 9 keys