Re-suggestion, thanks to Jarool and K1NG for the clarification!

Sale 1:

https://backpack.tf/profiles/76561198259500466#!/compare/1520985600/1521072000

https://backpack.tf/profiles/76561198090969423#!/compare/1520899200/1521072000

Sold for 28 pure + Baloonihoodie

Balloonihoodie sold for 5 keys instantly, can be assumed that was the expectation. most keys used to buy Burning Brain Wear.

Total is 33 pure.

http://www.tf2outpost.com/trade/29554286

B/O of 32 keys

Caps at 32 keys pure.

Sale 2:

https://backpack.tf/profiles/76561198090969423#!/compare/1522022400/1522108800

https://backpack.tf/profiles/76561198292156436#!/compare/1521936000/1522022400

Sold with 5.38 keys in sweets for 23 keys.

Total is 17.62 keys.

Sale 3:

https://backpack.tf/profiles/76561198292156436#!/compare/1522108800/1522368000

https://backpack.tf/profiles/76561198021055079#!/compare/1522195200/1522281600

Sold for 21 pure.

http://www.tf2outpost.com/trade/29618115

Current owner has B/O of 30 keys.

Considering buyers up to just above 20 keys, calling 21 & 17 outliers.

Taking 30 - 32 keys, on account of current seller.