History: https://backpack.tf/item/2059777417

Sale 1: Bulk

https://backpack.tf/profiles/76561198407997130#!/compare/1686355200/1686441600

Sale 2: Arcana Outdoorsman + 75 for Ooze Hound Dog + Vivid Plasma Ten Gallon

https://backpack.tf/profiles/76561198407997130#!/compare/1688083200/1688256000\\

Mini for Ten Gallon:

Sale 1:

140 keys

https://imgur.com/a/LJMRaYG

Sale 2: Used for Harves Jeepcap

https://backpack.tf/profiles/76561198035547951#!/compare/1687046400/1687305600

Sale 3: See above, sale 2 on Outdoorsman

https://backpack.tf/profiles/76561198407997130#!/compare/1688083200/1688256000\\

Sale 4: Bulk

https://backpack.tf/profiles/76561198407997130#!/compare/1689292800/1689897600

Since current listing for it is at 115 keys, using 115-140 keys.

https://imgur.com/a/w6j3qUm

Arcana Outdoorsman (X) + 75 for Ooze Hound Dog (400) + Die Job Vivid Ten Gallon (127.5)

X = 452.5

Taking 450 flat.

I know this is a bit of an unconventional way to get the value but I thought it would be acceptable. Feedback welcome!

Also, thanks to Icycreavasse for the help!