Sale 1:

https://backpack.tf/profiles/76561198411696312#!/compare/1525132800/1525219200

https://backpack.tf/profiles/76561198160856661#!/compare/1525132800/1525219200

Sold for 14 pure (1 key does not show up on Seller side)

Sale 2:

https://backpack.tf/profiles/76561198393247820#!/compare/1525996800/1526083200

https://backpack.tf/profiles/76561198232041512#!/compare/1525996800/1526083200

Bulk.

Sale 3:

https://backpack.tf/profiles/76561198830746853#!/compare/1526342400/1526428800

https://backpack.tf/profiles/76561198159481613#!/compare/1526428800/1526515200

Sold for 17 pure.

Sale 4:

https://backpack.tf/profiles/76561198318847306#!/compare/1523664000/1523750400

https://backpack.tf/profiles/76561198196597527#!/compare/1523232000/1523750400

Sold for 16 pure.

Sale 5:

https://backpack.tf/profiles/76561198196597527#!/compare/1525737600/1525996800

https://backpack.tf/profiles/76561198292089991#!/compare/1525651200/1526083200

Sold for DP Vintage Merryweather + 1 ref

https://backpack.tf/suggestion/5b133969cf6c7562fc24ee06

suggestion for 16 keys

Total is 16 keys.

Sale 6:

https://backpack.tf/profiles/76561198292089991#!/compare/1525651200/1526083200

https://backpack.tf/profiles/76561198140565712#!/compare/1525996800/1526083200

Sold for GF Powdered + a key

Powdered Mini:

https://backpack.tf/profiles/76561198292089991#!/compare/1526083200/1526169600

Sold for ~13 keys in items

Total is 14 keys.

Sale 7:

https://backpack.tf/profiles/76561198140565712#!/compare/1526083200/1526169600

https://backpack.tf/profiles/76561198218628708#!/compare/1526083200/1526169600

Sold for Strange Aces Topi + 7 keys

Topi Mini:

https://backpack.tf/suggestion/5b158d8544325a67fd753cea

Suggestion for 11.5 keys

Total is 19.5 keys.

Sale 8:

https://backpack.tf/profiles/76561198218628708#!/compare/1526083200/1526169600

https://backpack.tf/profiles/76561198433889628#!/compare/1526169600/1526256000

Sold for Stormy Billycock + 11.66 ref in sweets

Billycock Mini:

https://backpack.tf/suggestion/5b0cab2bcf6c7555136a55cf

Suggestion for 14 keys.

Total is 14.42 keys

Sale 9:

https://backpack.tf/profiles/76561198433889628#!/compare/1526342400/1526428800

https://backpack.tf/profiles/76561198043982289#!/compare/1526256000/1526342400

Sold for Steaming Tylorean + 28.24 ref in sweets.

Tylorean Mini:

https://backpack.tf/suggestion/5b0c42cecf6c752c126955f2

Suggestion for 13 keys.

Total is 14.03 keys

Sale 10:

https://backpack.tf/profiles/76561198342610503#!/compare/1522886400/1523145600

Not fully traceable, probably 12 keys.

Sale 11:

https://backpack.tf/profiles/76561198115563011#!/compare/1523836800/1523923200

https://backpack.tf/profiles/76561198159809553#!/compare/1523836800/1523923200

Sold for Duped Stormy Bonk Helm

No usable sales on the dupe, not using.

Sale 12:

https://backpack.tf/profiles/76561198159809553#!/compare/1523923200/1524009600

https://backpack.tf/profiles/76561198320216547#!/compare/1523836800/1523923200

Untraceable.

Sale 13:

https://backpack.tf/profiles/76561198320216547#!/compare/1525824000/1526688000

https://backpack.tf/profiles/76561198286708975#!/compare/1526601600/1526688000

Sold for Miami Slouch + 2 keys

Slouch Mini:

https://backpack.tf/suggestion/5b0c1e2744325a67f850b027

Suggestion for 15.5 keys.

Total is 17.5 keys.

Sale 14:

https://marketplace.tf/items/523;5;u36

Sold for 36 USD

Keys at 1.96

Total is 36 / 1.96 = 18.37 keys

Sale 15:

https://backpack.tf/profiles/76561198286708975#!/compare/1527638400/1527724800

https://backpack.tf/profiles/76561198349886701#!/compare/1527638400/1527724800

Sold with 13 keys for Blizzardy Company Mann

Sale 16:

https://backpack.tf/profiles/76561198198332539#!/compare/1527292800/1527379200

Sold for 18.5 keys

Total sales @:

14, 14, 14.03, 14.42, 16, 16, 17, 17.5, 18.37, 18.5, 19.5

Buyers up to 13 keys

Mindacos' Part:

Unsolds at ~14.5 and 15 currently. Sales at 14 will need to be included here to give this a range of 14-20.

Taking 14 -20 keys.