Team 4: Thundercats! - Zeckatz.

Mini For Dead Presidents Hat of Cards.

Sale 1: Bulk.

https://backpack.tf/profiles/76561198340960601#!/compare/1570406400/1570492800

https://backpack.tf/profiles/76561198211416633#!/compare/1570233600/1570492800

Sale 2: Untrace/QS.

https://backpack.tf/profiles/76561198211416633#!/compare/1574985600/1575072000

https://backpack.tf/profiles/76561198337734785#!/compare/1574985600/1575072000

Sale 3: ~18 Keys Pure.

https://backpack.tf/profiles/76561198337734785#!/compare/1575676800/1575763200

https://backpack.tf/profiles/76561198211416633#!/compare/1575676800/1575763200 - 18.49 Keys Pure

https://bot.tf/stats/listings/YDLQLER5

Sale 4: Untrace.

https://backpack.tf/profiles/76561198023034908#!/compare/1573603200/1573689600

https://backpack.tf/profiles/76561198096750546#!/compare/1573603200/1573689600

Sale 5: Untrace.

https://backpack.tf/profiles/76561198096750546#!/compare/1574121600/1574208000

https://backpack.tf/profiles/76561198132111326#!/compare/1574121600/1574208000

Sale 6: Untrace.

https://backpack.tf/profiles/76561198132111326#!/compare/1574208000/1574294400

https://backpack.tf/profiles/76561198200931923#!/compare/1574294400/1575936000

Sale 7: Untrace/QS.

https://backpack.tf/profiles/76561198319776462#!/compare/1573430400/1573516800

https://backpack.tf/profiles/76561198311498888#!/compare/1573344000/1573430400

Sale 8: ~19 Keys Pure.

https://backpack.tf/profiles/76561198311498888#!/compare/1574553600/1574640000

https://backpack.tf/profiles/76561198081187170#!/compare/1574553600/1574640000

https://stntrading.eu/search?query=unusual%20Toy%20Soldier&category=

Sale 9: Use There.

Sold For Dead Presidents Hat of Cards.

https://backpack.tf/profiles/76561198081187170#!/compare/1574553600/1574640000

https://backpack.tf/profiles/76561198436581726#!/compare/1574553600/1574640000

Sale 10: ~22 Keys.

https://marketplace.tf/items/tf2/30316;5;u109 - Nov 11.

$39.99 / $1.80 = 22.22 keys. - No B/O.

Sales: 18/19/22.

Going with 18-22 Keys.