http://steamcommunity.com/market/listings/440/Unusual%20Shooter%27s%20Sola%20Topi

Listing on SCM for about 10.5 keys

Sale 1:

https://backpack.tf/profiles/76561198304138933#!/compare/1517097600/1517184000

https://backpack.tf/profiles/76561198066802889#!/compare/1517097600/1517184000

Sold with Blizzardy Cowl for 29 keys + 55 ref

Sale 2:

https://backpack.tf/profiles/76561198328824242#!/compare/1521072000/1521158400

Sold for 9 keys + 18 ref

Sale 3:

https://backpack.tf/profiles/76561197994697258#!/compare/1520035200/1520121600

Sold for Pro KS Sniper Rifle(10.03) + about 22 ref in sweets

Total is 10.03 + 0.68 = 10.71 keys

Sale 4:

https://backpack.tf/profiles/76561198079300362#!/compare/1518393600/1518480000

https://backpack.tf/profiles/76561197994697258#!/compare/1518393600/1518480000

Sold with Bubbling Capotain + Smoking Modest for Searing Tree + a key

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198072240925#!/compare/1520640000/1520726400

https://backpack.tf/profiles/76561198047517914#!/compare/1520294400/1520726400

Sold for 9 keys + 7.33 ref

Sale 6:

https://backpack.tf/profiles/76561198162429678#!/compare/1520380800/1520640000

https://backpack.tf/profiles/76561198072240925#!/compare/1520380800/1520640000

Sold for 9 keys

Sale 7:

https://backpack.tf/profiles/76561198366635395#!/compare/1519516800/1520640000

https://backpack.tf/profiles/76561198162429678#!/compare/1520380800/1520640000

Sold for 8 keys

Sale 8:

https://backpack.tf/profiles/76561198141274389#!/compare/1508889600/1520121600

https://backpack.tf/profiles/76561198002757046#!/compare/1520035200/1520121600

Sold for 9 keys 4 ref

Sale 9:

https://backpack.tf/profiles/76561198342161127#!/compare/1518048000/1518134400

Sale here unclear, sold to TF2Mart bots, but multiple sales to multiple bots make it hard to find what it sold for.

Sale 10:

https://backpack.tf/profiles/76561198043936328#!/compare/1520553600/1520640000

https://backpack.tf/profiles/76561198260321671#!/compare/1520553600/1520640000

Sold for 9 keys + 15 ref (bow is an item drop)

Sale 11:

https://backpack.tf/profiles/76561198350807742#!/compare/1517616000/1517702400

https://backpack.tf/profiles/76561198043936328#!/compare/1517616000/1517702400

Bulk.

Sales @ 8, 9, 9.12, 9.23, 9.46, 9.56, 10.71

8 keys is below QS, 10.71 rounded up as an outlier.

Taking 9-10 keys, 10 from 9.56 & 10.71