Re-suggesting, Thank you everyone for the input.

Sale #1: ~12 Keys 50.33 Ref

Item #1: https://backpack.tf/item/13773893874

Trade Screenshot: https://imgur.com/NeKPu6B

Sale #2: Sold for Haunted Ghosts Pyro's Boron Beanie [14 Keys] + Fountain of Delight Taunt: Yeti Punch [3 Keys].

Buyer: https://backpack.tf/profiles/76561198127037310#!/compare/1703808000/1706745600

Seller: https://backpack.tf/profiles/76561198289372905#!/compare/1706659200/1706745600

Mini for Boron Beanie ~14 Keys

https://backpack.tf/profiles/76561198838094393#!/compare/1706659200/1706832000

Trade Screenshot: https://imgur.com/a/fD908fB

Item #2 - https://backpack.tf/item/13976040628

No recent sale for Yeti Punch so pricing it around ~3 Keys as Strange Fry suggested.

Item #3 - https://backpack.tf/item/13835725449

Sale #1: Rounding off to ~13 Keys.

Sale #2: ~17 Keys.