I like Mulling things

Hmmm

Sellers: - https://gyazo.com/630b470814ead0874bb53466e3f4933f

https://backpack.tf/item/738435613 - 1 day @ 15 keys

Sale 1)

https://backpack.tf/item/3420579137 https://marketplace.tf/items/tf2/147;5;u33

$22.99 / $2.10 = 11 keys - Caps at buyout

Buyout was 8.5 keys https://gladiator.tf/listings/5fe89b17c04e7405cb06bd50

Sale 2)

https://backpack.tf/profiles/76561198063918562#!/compare/1615852800/1616803200

https://backpack.tf/profiles/76561198385962271#!/compare/1613433600/1616889600

https://gyazo.com/ecc0eb80162574aa80d598e4c0a27a38 - Sold for 13 keys + 20 refined = 13 keys, once rounded

Sale 3)

https://backpack.tf/profiles/76561198154709092#!/compare/1614902400/1614988800

https://backpack.tf/profiles/76561198063918562#!/compare/1614902400/1615248000 - Sold for 13 keys

Sale 4)

https://backpack.tf/profiles/76561198154709092#!/compare/1614124800/1614211200

https://backpack.tf/profiles/76561198177872379#!/compare/1614124800/1614211200 - Sold for 9 keys + Double Spelled Botkiller Wrench (No mini)

Buyout was 15 keys https://gladiator.tf/listings/60364ca82efa19e9d13e82fe

Sale 5)

https://backpack.tf/profiles/76561198048744863#!/compare/1612828800/1613088000

https://backpack.tf/profiles/76561198177872379#!/compare/1613001600/1613088000 - Spell trade, not using

Sale 6)

https://backpack.tf/profiles/76561198105655649#!/compare/1612656000/1614211200

https://backpack.tf/profiles/76561198048744863#!/compare/1612656000/1612742400 - Untrace

Sale 7)

https://backpack.tf/profiles/76561198080179568#!/compare/1615766400/1615852800

https://backpack.tf/profiles/76561198054272235#!/compare/1616976000/1617062400

https://marketplace.tf/items/tf2/147;5;u33

$22.99 / $2.15 = 11 keys

No buyout

Sale 8)

https://backpack.tf/profiles/76561198359016103#!/compare/1615680000/1615766400

https://backpack.tf/profiles/76561198080179568#!/compare/1615680000/1615766400 - Sold via buy order for 8 keys + 3 ref

Sale 9)

https://backpack.tf/profiles/76561199102407070#!/compare/1613433600/1613520000

https://backpack.tf/profiles/76561198359016103#!/compare/1613433600/1613520000 - Only 6 keys match but it was likely ~9.5 keys - https://gladiator.tf/listings/602b5c6d1aa500fac523ade9

Sale 10)

https://backpack.tf/profiles/76561198164858890#!/compare/1611964800/1612137600

https://backpack.tf/profiles/76561199102407070#!/compare/1612051200/1612137600 - Sold via buy order for ~8.5 keys

Sale 11)

https://backpack.tf/profiles/76561198164858890#!/compare/1611187200/1611619200

https://gladiator.tf/listings/600e4208dea8081976da848c - Sold for 9 keys + 41 ref (~0.8 keys) = 10 keys, once rounded

Note: - https://backpack.tf/item/483215150 - Ignoring tradebacks

Sale 12)

https://marketplace.tf/items/tf2/147;5;u33

$22.99 / $2.10 = 11 keys

Sales:

8.5, 10, 11, 11, 13 and 13

8.5 seems supported from all the sales via buy orders, ie sales 8 and 10

Calling 13 high since all the sales ~13 (including sale 4) was with the spelled version of the mullet, various lower sales support excluding, as well as keeping the range narrower

Thanks =)