For the Orbiting Planets Large Luchadore you can't just make an average between sellers and buyers, you need to find some sales for it to prove it's actual value, AKA a mini

While I'm at it, there are more histories with recent sales for the Tundra Top:

https://backpack.tf/item/9692855770 (deposit to marketplace.tf but still worth mentioning)

https://backpack.tf/item/9683535141

https://backpack.tf/item/9672251909

https://backpack.tf/item/9642870596 (your one but it sold twice before going to you)

bumping Strange's comment. You will need to look into other tundra sales and mini the luchador