Since I priced the teufort we can use that sale here

Sale #1:

https://backpack.tf/profiles/76561199564942025#!/compare/1719100800/1719187200 ~ 10 keys pure matches

https://backpack.tf/profiles/76561198294649667#!/compare/1719100800/1719187200 ~ also bought a Petal Prance Taunt: Teufort Tango + 9.66 ref

Mini teufort tango:

https://backpack.tf/suggestion/66bd90a3d8f7347b5a00eb69 ~ 4.175

9.66 ref = 0.17 keys

So 10 - 4.345 (4.175+0.17) = 5.655

(Rule - for all unusuals 5-10 keys, please round to the nearest 0.5 keys. No other decimals are allowed.) so this would be 5.5 keys.

Sale #2:

https://backpack.tf/profiles/76561199059160806#!/compare/1720742400/1720828800 ~ no matches

https://backpack.tf/profiles/76561198820153698#!/compare/1720828800/1720915200 ~ not all 10 keys match so lets open them individually yayyy

5 keys match.

Sale #3:

https://backpack.tf/profiles/76561199481626689#!/compare/1717545600/1719360000 ~ 3 keys + 67.33 ref

67.33 = 1.2 keys

= 4.2 keys

https://backpack.tf/profiles/76561199059160806#!/compare/1719273600/1719360000

Sale #4:

https://backpack.tf/profiles/76561199059160806#!/compare/1717113600/1717200000 ~ 1 key matches

https://backpack.tf/profiles/76561199481626689#!/compare/1717027200/1717286400 ~ ?

Sales @ 4.2, 5.5, 5

Considering 4.2 is a buy order dump (and buyers are 4.19), going to take 5-5.5 here.